97891580 has 24 divisors (see below), whose sum is σ = 208944960. Its totient is φ = 38514240.

The previous prime is 97891579. The next prime is 97891589. The reversal of 97891580 is 8519879.

It is a happy number.

It is a super-2 number, since 2×97891580² = 19165522869792800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97891589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38900 + ... + 41339.

It is an arithmetic number, because the mean of its divisors is an integer number (8706040).

Almost surely, 2^97891580 is an apocalyptic number.

It is an amenable number.

97891580 is an abundant number, since it is smaller than the sum of its proper divisors (111053380).

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

97891580 is a wasteful number, since it uses less digits than its factorization.

97891580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80309 (or 80307 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 97891580 is about 9894.0173842580. The cubic root of 97891580 is about 460.8735448679.

The spelling of 97891580 in words is "ninety-seven million, eight hundred ninety-one thousand, five hundred eighty".