78609898 has 16 divisors (see below), whose sum is σ = 119808000. Its totient is φ = 38677392.

The previous prime is 78609863. The next prime is 78609901. The reversal of 78609898 is 89890687.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60823 + ... + 62101.

It is an arithmetic number, because the mean of its divisors is an integer number (7488000).

Almost surely, 2^78609898 is an apocalyptic number.

78609898 is a deficient number, since it is larger than the sum of its proper divisors (41198102).

78609898 is a wasteful number, since it uses less digits than its factorization.

78609898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 78609898 is about 8866.2223071610. Note that the first 3 decimals coincide. The cubic root of 78609898 is about 428.3766046443.

It can be divided in two parts, 78609 and 898, that added together give a cube (79507 = 43³).

The spelling of 78609898 in words is "seventy-eight million, six hundred nine thousand, eight hundred ninety-eight".