897931520 has 36 divisors (see below), whose sum is σ = 2150829660. Its totient is φ = 359172096.

The previous prime is 897931519. The next prime is 897931543. The reversal of 897931520 is 25139798.

It can be written as a sum of positive squares in 2 ways, for example, as 158961664 + 738969856 = 12608^2 + 27184^2 .

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 3 ways as a sum of consecutive naturals, for example, 349475 + ... + 352034.

Almost surely, 2^897931520 is an apocalyptic number.

897931520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

897931520 is an abundant number, since it is smaller than the sum of its proper divisors (1252898140).

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

897931520 is an equidigital number, since it uses as much as digits as its factorization.

897931520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701530 (or 701516 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 897931520 is about 29965.5055021603. The cubic root of 897931520 is about 964.7491522275.

The spelling of 897931520 in words is "eight hundred ninety-seven million, nine hundred thirty-one thousand, five hundred twenty".