97912780 has 60 divisors (see below), whose sum is σ = 239989680. Its totient is φ = 33553632.

The previous prime is 97912777. The next prime is 97912781. The reversal of 97912780 is 8721979.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97912781) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47001 + ... + 49039.

It is an arithmetic number, because the mean of its divisors is an integer number (3999828).

Almost surely, 2^97912780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97912780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119994840).

97912780 is an abundant number, since it is smaller than the sum of its proper divisors (142076900).

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

97912780 is a wasteful number, since it uses less digits than its factorization.

97912780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 97912780 is about 9895.0886807547. The cubic root of 97912780 is about 460.9068123321.

The spelling of 97912780 in words is "ninety-seven million, nine hundred twelve thousand, seven hundred eighty".