97597440 has 192 divisors, whose sum is σ = 347911200. Its totient is φ = 25952256.

The previous prime is 97597429. The next prime is 97597447. The reversal of 97597440 is 4479579.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97597447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276304 + ... + 276656.

Almost surely, 2^97597440 is an apocalyptic number.

97597440 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 97597440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173955600).

97597440 is an abundant number, since it is smaller than the sum of its proper divisors (250313760).

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

97597440 is a wasteful number, since it uses less digits than its factorization.

97597440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 97597440 is about 9879.1416631203. The cubic root of 97597440 is about 460.4114780667.

The spelling of 97597440 in words is "ninety-seven million, five hundred ninety-seven thousand, four hundred forty".