997627980 has 48 divisors (see below), whose sum is σ = 2795143680. Its totient is φ = 265864128.

The previous prime is 997627979. The next prime is 997628069. The reversal of 997627980 is 89726799.

It is a self number, because there is not a number n which added to its sum of digits gives 997627980.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110061 + ... + 118779.

It is an arithmetic number, because the mean of its divisors is an integer number (58232160).

Almost surely, 2^997627980 is an apocalyptic number.

It is an amenable number.

997627980 is an abundant number, since it is smaller than the sum of its proper divisors (1797515700).

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

997627980 is a wasteful number, since it uses less digits than its factorization.

997627980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 57.

The square root of 997627980 is about 31585.2494053791. The cubic root of 997627980 is about 999.2087006772.

The spelling of 997627980 in words is "nine hundred ninety-seven million, six hundred twenty-seven thousand, nine hundred eighty".