98640855 has 32 divisors (see below), whose sum is σ = 176299200. Its totient is φ = 52327296.

The previous prime is 98640833. The next prime is 98640863. The reversal of 98640855 is 55804689.

It is not a de Polignac number, because 98640855 - 2²⁵ = 65086423 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 98640855.

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, 24741 + ... + 28449.

It is an arithmetic number, because the mean of its divisors is an integer number (5509350).

Almost surely, 2^98640855 is an apocalyptic number.

98640855 is a deficient number, since it is larger than the sum of its proper divisors (77658345).

98640855 is a wasteful number, since it uses less digits than its factorization.

98640855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 98640855 is about 9931.8102579540. The cubic root of 98640855 is about 462.0464196907.

The spelling of 98640855 in words is "ninety-eight million, six hundred forty thousand, eight hundred fifty-five".