97422640 has 40 divisors (see below), whose sum is σ = 258867360. Its totient is φ = 33401856.

The previous prime is 97422617. The next prime is 97422643. The reversal of 97422640 is 4622479.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 97422596 and 97422605.

It is not an unprimeable number, because it can be changed into a prime (97422643) 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 7 ways as a sum of consecutive naturals, for example, 86425 + ... + 87544.

It is an arithmetic number, because the mean of its divisors is an integer number (6471684).

Almost surely, 2^97422640 is an apocalyptic number.

It is an amenable number.

97422640 is an abundant number, since it is smaller than the sum of its proper divisors (161444720).

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

97422640 is a wasteful number, since it uses less digits than its factorization.

97422640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173989 (or 173983 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 97422640 is about 9870.2907758586. The cubic root of 97422640 is about 460.1364434566.

The spelling of 97422640 in words is "ninety-seven million, four hundred twenty-two thousand, six hundred forty".