897953920 has 64 divisors (see below), whose sum is σ = 2151590040. Its totient is φ = 358359040.

The previous prime is 897953911. The next prime is 897953921. The reversal of 897953920 is 29359798.

It can be written as a sum of positive squares in 4 ways, for example, as 595750464 + 302203456 = 24408^2 + 17384^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (897953921) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 332094 + ... + 334786.

Almost surely, 2^897953920 is an apocalyptic number.

897953920 is a gapful number since it is divisible by the number (80) 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 897953920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075795020).

897953920 is an abundant number, since it is smaller than the sum of its proper divisors (1253636120).

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

897953920 is a wasteful number, since it uses less digits than its factorization.

897953920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233 (or 3221 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 897953920 is about 29965.8792629217. The cubic root of 897953920 is about 964.7571744433.

The spelling of 897953920 in words is "eight hundred ninety-seven million, nine hundred fifty-three thousand, nine hundred twenty".