97880920 has 16 divisors (see below), whose sum is σ = 220232160. Its totient is φ = 39152352.

The previous prime is 97880851. The next prime is 97880929. The reversal of 97880920 is 2908879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97880929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223472 + ... + 1223551.

It is an arithmetic number, because the mean of its divisors is an integer number (13764510).

Almost surely, 2^97880920 is an apocalyptic number.

It is an amenable number.

97880920 is an abundant number, since it is smaller than the sum of its proper divisors (122351240).

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

97880920 is a wasteful number, since it uses less digits than its factorization.

97880920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447034 (or 2447030 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 97880920 is about 9893.4786602085. The cubic root of 97880920 is about 460.8568151678.

The spelling of 97880920 in words is "ninety-seven million, eight hundred eighty thousand, nine hundred twenty".