74736240 has 80 divisors (see below), whose sum is σ = 233476128. Its totient is φ = 19775488.

The previous prime is 74736209. The next prime is 74736283. The reversal of 74736240 is 4263747.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31744 + ... + 34016.

Almost surely, 2^74736240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74736240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116738064).

74736240 is an abundant number, since it is smaller than the sum of its proper divisors (158739888).

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

74736240 is a wasteful number, since it uses less digits than its factorization.

74736240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 74736240 is about 8645.0124349245. The cubic root of 74736240 is about 421.2213879900.

Adding to 74736240 its reverse (4263747), we get a palindrome (78999987).

The spelling of 74736240 in words is "seventy-four million, seven hundred thirty-six thousand, two hundred forty".