97897079880 has 48 divisors (see below), whose sum is σ = 318165510780. Its totient is φ = 26105887872.

The previous prime is 97897079879. The next prime is 97897079899. The reversal of 97897079880 is 8897079879.

It can be written as a sum of positive squares in 2 ways, for example, as 91769008356 + 6128071524 = 302934^2 + 78282^2 .

It is a super-2 number, since 2×97897079880² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 97897079799 and 97897079808.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135967807 + ... + 135968526.

Almost surely, 2^97897079880 is an apocalyptic number.

97897079880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97897079880 is an abundant number, since it is smaller than the sum of its proper divisors (220268430900).

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

97897079880 is a wasteful number, since it uses less digits than its factorization.

97897079880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271936350 (or 271936343 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 72.

The spelling of 97897079880 in words is "ninety-seven billion, eight hundred ninety-seven million, seventy-nine thousand, eight hundred eighty".