97642320 has 80 divisors (see below), whose sum is σ = 310105152. Its totient is φ = 25400320.

The previous prime is 97642313. The next prime is 97642393. The reversal of 97642320 is 2324679.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4879 + ... + 14801.

Almost surely, 2^97642320 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 97642320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155052576).

97642320 is an abundant number, since it is smaller than the sum of its proper divisors (212462832).

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

97642320 is a wasteful number, since it uses less digits than its factorization.

97642320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9980 (or 9974 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 97642320 is about 9881.4128544455. The cubic root of 97642320 is about 460.4820403705.

Adding to 97642320 its reverse (2324679), we get a palindrome (99966999).

The spelling of 97642320 in words is "ninety-seven million, six hundred forty-two thousand, three hundred twenty".