78915498 has 16 divisors (see below), whose sum is σ = 157918080. Its totient is φ = 26290656.

The previous prime is 78915497. The next prime is 78915527. The reversal of 78915498 is 89451987.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78915498.

It is not an unprimeable number, because it can be changed into a prime (78915497) 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 7 ways as a sum of consecutive naturals, for example, 19311 + ... + 23037.

It is an arithmetic number, because the mean of its divisors is an integer number (9869880).

Almost surely, 2^78915498 is an apocalyptic number.

78915498 is an abundant number, since it is smaller than the sum of its proper divisors (79002582).

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

78915498 is a wasteful number, since it uses less digits than its factorization.

78915498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261.

The product of its digits is 725760, while the sum is 51.

The square root of 78915498 is about 8883.4395365759. The cubic root of 78915498 is about 428.9309988403.

The spelling of 78915498 in words is "seventy-eight million, nine hundred fifteen thousand, four hundred ninety-eight".