897778488 has 32 divisors (see below), whose sum is σ = 2266243200. Its totient is φ = 296353248.

The previous prime is 897778487. The next prime is 897778513. The reversal of 897778488 is 884877798.

It is a super-2 number, since 2×897778488² = 1612012427031132288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897778487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179118 + ... + 184061.

It is an arithmetic number, because the mean of its divisors is an integer number (70820100).

Almost surely, 2^897778488 is an apocalyptic number.

It is an amenable number.

897778488 is an abundant number, since it is smaller than the sum of its proper divisors (1368464712).

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

897778488 is a wasteful number, since it uses less digits than its factorization.

897778488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363291 (or 363287 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 66.

The square root of 897778488 is about 29962.9519240011. The cubic root of 897778488 is about 964.6943425985.

The spelling of 897778488 in words is "eight hundred ninety-seven million, seven hundred seventy-eight thousand, four hundred eighty-eight".