97990040 has 32 divisors (see below), whose sum is σ = 233448480. Its totient is φ = 36890112.

The previous prime is 97990033. The next prime is 97990063. The reversal of 97990040 is 4009979.

97990040 = 1067² + 1068² + ... + 1146².

It is a junction number, because it is equal to n+sod(n) for n = 97989976 and 97990003.

It is a congruent number.

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, 71372 + ... + 72731.

It is an arithmetic number, because the mean of its divisors is an integer number (7295265).

Almost surely, 2^97990040 is an apocalyptic number.

It is an amenable number.

97990040 is an abundant number, since it is smaller than the sum of its proper divisors (135458440).

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

97990040 is a wasteful number, since it uses less digits than its factorization.

97990040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144131 (or 144127 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 97990040 is about 9898.9918678621. The cubic root of 97990040 is about 461.0280096476.

It can be divided in two parts, 979 and 90040, that added together give a palindrome (91019).

The spelling of 97990040 in words is "ninety-seven million, nine hundred ninety thousand, forty".