97539840 has 108 divisors (see below), whose sum is σ = 337517544. Its totient is φ = 26007552.

The previous prime is 97539839. The next prime is 97539851. The reversal of 97539840 is 4893579.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7287 + ... + 15753.

Almost surely, 2^97539840 is an apocalyptic number.

97539840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168758772).

97539840 is an abundant number, since it is smaller than the sum of its proper divisors (239977704).

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

97539840 is a wasteful number, since it uses less digits than its factorization.

97539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8494 (or 8477 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 97539840 is about 9876.2259998443. The cubic root of 97539840 is about 460.3208851168.

The spelling of 97539840 in words is "ninety-seven million, five hundred thirty-nine thousand, eight hundred forty".