97190640 has 120 divisors (see below), whose sum is σ = 340647840. Its totient is φ = 24786432.

The previous prime is 97190633. The next prime is 97190657. The reversal of 97190640 is 4609179.

97190640 is a `hidden beast` number, since 9 + 7 + 1 + 9 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 97190595 and 97190604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13626 + ... + 19494.

It is an arithmetic number, because the mean of its divisors is an integer number (2838732).

Almost surely, 2^97190640 is an apocalyptic number.

97190640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97190640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170323920).

97190640 is an abundant number, since it is smaller than the sum of its proper divisors (243457200).

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

97190640 is a wasteful number, since it uses less digits than its factorization.

97190640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5911 (or 5902 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 97190640 is about 9858.5313307815. The cubic root of 97190640 is about 459.7709004103.

The spelling of 97190640 in words is "ninety-seven million, one hundred ninety thousand, six hundred forty".