97188640 has 48 divisors (see below), whose sum is σ = 235828152. Its totient is φ = 37822464.

The previous prime is 97188617. The next prime is 97188647. The reversal of 97188640 is 4688179.

It can be written as a sum of positive squares in 4 ways, for example, as 84713616 + 12475024 = 9204^2 + 3532^2 .

It is not an unprimeable number, because it can be changed into a prime (97188647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289 + ... + 14128.

Almost surely, 2^97188640 is an apocalyptic number.

It is an amenable number.

97188640 is an abundant number, since it is smaller than the sum of its proper divisors (138639512).

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

97188640 is a wasteful number, since it uses less digits than its factorization.

97188640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16469 (or 16461 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 97188640 is about 9858.4298952724. The cubic root of 97188640 is about 459.7677466495.

The spelling of 97188640 in words is "ninety-seven million, one hundred eighty-eight thousand, six hundred forty".