97722780 has 48 divisors (see below), whose sum is σ = 274294944. Its totient is φ = 25995520.

The previous prime is 97722733. The next prime is 97722787. The reversal of 97722780 is 8722779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97722787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25894 + ... + 29426.

It is an arithmetic number, because the mean of its divisors is an integer number (5714478).

Almost surely, 2^97722780 is an apocalyptic number.

It is an amenable number.

97722780 is an abundant number, since it is smaller than the sum of its proper divisors (176572164).

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

97722780 is a wasteful number, since it uses less digits than its factorization.

97722780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006 (or 4004 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 97722780 is about 9885.4832962279. The cubic root of 97722780 is about 460.6084890004.

The spelling of 97722780 in words is "ninety-seven million, seven hundred twenty-two thousand, seven hundred eighty".