97640532 has 48 divisors (see below), whose sum is σ = 276158400. Its totient is φ = 29587680.

The previous prime is 97640531. The next prime is 97640533. The reversal of 97640532 is 23504679.

97640532 is a `hidden beast` number, since 9 + 7 + 640 + 5 + 3 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (97640531) and next prime (97640533).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97640531) 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, 39907 + ... + 42282.

It is an arithmetic number, because the mean of its divisors is an integer number (5753300).

Almost surely, 2^97640532 is an apocalyptic number.

It is an amenable number.

97640532 is an abundant number, since it is smaller than the sum of its proper divisors (178517868).

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

97640532 is a wasteful number, since it uses less digits than its factorization.

97640532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82213 (or 82205 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 97640532 is about 9881.3223811391. The cubic root of 97640532 is about 460.4792296121.

The spelling of 97640532 in words is "ninety-seven million, six hundred forty thousand, five hundred thirty-two".