97185840 has 40 divisors (see below), whose sum is σ = 301276848. Its totient is φ = 25916160.

The previous prime is 97185839. The next prime is 97185857. The reversal of 97185840 is 4858179.

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

It is a junction number, because it is equal to n+sod(n) for n = 97185792 and 97185801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202231 + ... + 202710.

Almost surely, 2^97185840 is an apocalyptic number.

It is an amenable number.

97185840 is an abundant number, since it is smaller than the sum of its proper divisors (204091008).

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

97185840 is a wasteful number, since it uses less digits than its factorization.

97185840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404957 (or 404951 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 97185840 is about 9858.2878838062. The cubic root of 97185840 is about 459.7633313116.

The spelling of 97185840 in words is "ninety-seven million, one hundred eighty-five thousand, eight hundred forty".