194551740 has 96 divisors (see below), whose sum is σ = 640906560. Its totient is φ = 48826368.

The previous prime is 194551739. The next prime is 194551771. The reversal of 194551740 is 47155491.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 194551695 and 194551704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1417 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (6676110).

Almost surely, 2^194551740 is an apocalyptic number.

194551740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194551740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320453280).

194551740 is an abundant number, since it is smaller than the sum of its proper divisors (446354820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194551740 is a wasteful number, since it uses less digits than its factorization.

194551740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21228 (or 21220 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 194551740 is about 13948.1805265060. The cubic root of 194551740 is about 579.4443151849. Note that the first 3 decimals are identical.

The spelling of 194551740 in words is "one hundred ninety-four million, five hundred fifty-one thousand, seven hundred forty".