97166440 has 128 divisors (see below), whose sum is σ = 261999360. Its totient is φ = 31739904.

The previous prime is 97166417. The next prime is 97166449. The reversal of 97166440 is 4466179.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 97166440.

It is not an unprimeable number, because it can be changed into a prime (97166449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 859824 + ... + 859936.

It is an arithmetic number, because the mean of its divisors is an integer number (2046870).

Almost surely, 2^97166440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97166440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130999680).

97166440 is an abundant number, since it is smaller than the sum of its proper divisors (164832920).

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

97166440 is a wasteful number, since it uses less digits than its factorization.

97166440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 97166440 is about 9857.3038910242. The cubic root of 97166440 is about 459.7327369981.

The spelling of 97166440 in words is "ninety-seven million, one hundred sixty-six thousand, four hundred forty".