997760064 has 56 divisors (see below), whose sum is σ = 3017040448. Its totient is φ = 285073920.

The previous prime is 997760041. The next prime is 997760077. The reversal of 997760064 is 460067799.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 997759995 and 997760022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369847 + ... + 372534.

Almost surely, 2^997760064 is an apocalyptic number.

It is an amenable number.

997760064 is an abundant number, since it is smaller than the sum of its proper divisors (2019280384).

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

997760064 is a wasteful number, since it uses less digits than its factorization.

997760064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742403 (or 742393 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 997760064 is about 31587.3402489035. The cubic root of 997760064 is about 999.2527964926.

The spelling of 997760064 in words is "nine hundred ninety-seven million, seven hundred sixty thousand, sixty-four".