97758640 has 40 divisors (see below), whose sum is σ = 259760160. Its totient is φ = 33517056.

The previous prime is 97758613. The next prime is 97758641. The reversal of 97758640 is 4685779.

It is a happy number.

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

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (97758641) 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, 86725 + ... + 87844.

It is an arithmetic number, because the mean of its divisors is an integer number (6494004).

Almost surely, 2^97758640 is an apocalyptic number.

It is an amenable number.

97758640 is an abundant number, since it is smaller than the sum of its proper divisors (162001520).

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

97758640 is a wasteful number, since it uses less digits than its factorization.

97758640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174589 (or 174583 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 97758640 is about 9887.2969005689. The cubic root of 97758640 is about 460.6648231886.

The spelling of 97758640 in words is "ninety-seven million, seven hundred fifty-eight thousand, six hundred forty".