97285440 has 224 divisors, whose sum is σ = 365174784. Its totient is φ = 21473280.

The previous prime is 97285439. The next prime is 97285451. The reversal of 97285440 is 4458279.

It is a tau number, because it is divible by the number of its divisors (224).

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, 208087 + ... + 208553.

Almost surely, 2^97285440 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 97285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182587392).

97285440 is an abundant number, since it is smaller than the sum of its proper divisors (267889344).

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

97285440 is a wasteful number, since it uses less digits than its factorization.

97285440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 97285440 is about 9863.3381773110. The cubic root of 97285440 is about 459.9203390725.

The spelling of 97285440 in words is "ninety-seven million, two hundred eighty-five thousand, four hundred forty".