78628998 has 32 divisors (see below), whose sum is σ = 183119616. Its totient is φ = 22040928.

The previous prime is 78628967. The next prime is 78628999. The reversal of 78628998 is 89982687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78628999) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15436 + ... + 19887.

It is an arithmetic number, because the mean of its divisors is an integer number (5722488).

Almost surely, 2^78628998 is an apocalyptic number.

78628998 is an abundant number, since it is smaller than the sum of its proper divisors (104490618).

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

78628998 is a wasteful number, since it uses less digits than its factorization.

78628998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35388.

The product of its digits is 3483648, while the sum is 57.

The square root of 78628998 is about 8867.2993633913. The cubic root of 78628998 is about 428.4112963341.

The spelling of 78628998 in words is "seventy-eight million, six hundred twenty-eight thousand, nine hundred ninety-eight".