97905520 has 40 divisors (see below), whose sum is σ = 228043440. Its totient is φ = 39091200.

The previous prime is 97905491. The next prime is 97905523. The reversal of 97905520 is 2550979.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 97905520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97905523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80920 + ... + 82120.

It is an arithmetic number, because the mean of its divisors is an integer number (5701086).

Almost surely, 2^97905520 is an apocalyptic number.

It is an amenable number.

97905520 is an abundant number, since it is smaller than the sum of its proper divisors (130137920).

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

97905520 is a wasteful number, since it uses less digits than its factorization.

97905520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2227 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 97905520 is about 9894.7218252966. The cubic root of 97905520 is about 460.8954203356.

The spelling of 97905520 in words is "ninety-seven million, nine hundred five thousand, five hundred twenty".