997030800 has 90 divisors (see below), whose sum is σ = 3459986322. Its totient is φ = 265873920.

The previous prime is 997030799. The next prime is 997030831. The reversal of 997030800 is 8030799.

It can be written as a sum of positive squares in 3 ways, for example, as 65804544 + 931226256 = 8112^2 + 30516^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-2 number, since 2×997030800² = 1988140832297280000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 134877 + ... + 142076.

Almost surely, 2^997030800 is an apocalyptic number.

997030800 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

997030800 is an abundant number, since it is smaller than the sum of its proper divisors (2462955522).

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

997030800 is a wasteful number, since it uses less digits than its factorization.

997030800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276977 (or 276963 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 997030800 is about 31575.7945268207. The cubic root of 997030800 is about 999.0092854755.

The spelling of 997030800 in words is "nine hundred ninety-seven million, thirty thousand, eight hundred".