195215840 has 24 divisors (see below), whose sum is σ = 461197800. Its totient is φ = 78086272.

The previous prime is 195215827. The next prime is 195215843. The reversal of 195215840 is 48512591.

It is a self number, because there is not a number n which added to its sum of digits gives 195215840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195215843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609890 + ... + 610209.

It is an arithmetic number, because the mean of its divisors is an integer number (19216575).

Almost surely, 2^195215840 is an apocalyptic number.

195215840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195215840 is an abundant number, since it is smaller than the sum of its proper divisors (265981960).

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

195215840 is a wasteful number, since it uses less digits than its factorization.

195215840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220114 (or 1220106 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 195215840 is about 13971.9662181097. The cubic root of 195215840 is about 580.1028751328.

The spelling of 195215840 in words is "one hundred ninety-five million, two hundred fifteen thousand, eight hundred forty".