97555440 has 40 divisors (see below), whose sum is σ = 302422608. Its totient is φ = 26014720.

The previous prime is 97555427. The next prime is 97555459. The reversal of 97555440 is 4455579.

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

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203001 + ... + 203480.

Almost surely, 2^97555440 is an apocalyptic number.

It is an amenable number.

97555440 is an abundant number, since it is smaller than the sum of its proper divisors (204867168).

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

97555440 is a wasteful number, since it uses less digits than its factorization.

97555440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406497 (or 406491 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 97555440 is about 9877.0157436343. The cubic root of 97555440 is about 460.3454242282.

The spelling of 97555440 in words is "ninety-seven million, five hundred fifty-five thousand, four hundred forty".