97970640 has 40 divisors (see below), whose sum is σ = 303709728. Its totient is φ = 26125440.

The previous prime is 97970623. The next prime is 97970651. The reversal of 97970640 is 4607979.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 97970592 and 97970601.

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, 203866 + ... + 204345.

Almost surely, 2^97970640 is an apocalyptic number.

It is an amenable number.

97970640 is an abundant number, since it is smaller than the sum of its proper divisors (205739088).

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

97970640 is a wasteful number, since it uses less digits than its factorization.

97970640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408227 (or 408221 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 97970640 is about 9898.0119215931. The cubic root of 97970640 is about 460.9975829713.

The spelling of 97970640 in words is "ninety-seven million, nine hundred seventy thousand, six hundred forty".