997622028 has 48 divisors (see below), whose sum is σ = 2785387360. Its totient is φ = 306960192.

The previous prime is 997622023. The next prime is 997622029. The reversal of 997622028 is 820226799.

It is not an unprimeable number, because it can be changed into a prime (997622023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353875 + ... + 356682.

Almost surely, 2^997622028 is an apocalyptic number.

It is an amenable number.

997622028 is an abundant number, since it is smaller than the sum of its proper divisors (1787765332).

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

997622028 is a wasteful number, since it uses less digits than its factorization.

997622028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710583 (or 710575 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 997622028 is about 31585.1551840418. The cubic root of 997622028 is about 999.2067135296.

The spelling of 997622028 in words is "nine hundred ninety-seven million, six hundred twenty-two thousand, twenty-eight".