97162640 has 20 divisors (see below), whose sum is σ = 225903324. Its totient is φ = 38865024.

The previous prime is 97162627. The next prime is 97162643. The reversal of 97162640 is 4626179.

It can be written as a sum of positive squares in 2 ways, for example, as 36385024 + 60777616 = 6032^2 + 7796^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×97162640² = 18881157223539200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97162640.

It is not an unprimeable number, because it can be changed into a prime (97162643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607187 + ... + 607346.

Almost surely, 2^97162640 is an apocalyptic number.

It is an amenable number.

97162640 is an abundant number, since it is smaller than the sum of its proper divisors (128740684).

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

97162640 is a wasteful number, since it uses less digits than its factorization.

97162640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214546 (or 1214540 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 97162640 is about 9857.1111386653. Note that the first 4 decimals coincide. The cubic root of 97162640 is about 459.7267438205.

The spelling of 97162640 in words is "ninety-seven million, one hundred sixty-two thousand, six hundred forty".