97999440 has 160 divisors (see below), whose sum is σ = 378832896. Its totient is φ = 20359680.

The previous prime is 97999427. The next prime is 97999459. The reversal of 97999440 is 4499979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15829 + ... + 21131.

Almost surely, 2^97999440 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 97999440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189416448).

97999440 is an abundant number, since it is smaller than the sum of its proper divisors (280833456).

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

97999440 is a wasteful number, since it uses less digits than its factorization.

97999440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337 (or 5331 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 97999440 is about 9899.4666523000. The cubic root of 97999440 is about 461.0427510258.

The spelling of 97999440 in words is "ninety-seven million, nine hundred ninety-nine thousand, four hundred forty".