678695136 has 48 divisors (see below), whose sum is σ = 2036087424. Its totient is φ = 193912704.

The previous prime is 678695117. The next prime is 678695159. The reversal of 678695136 is 631596876.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 504310 + ... + 505653.

It is an arithmetic number, because the mean of its divisors is an integer number (42418488).

Almost surely, 2^678695136 is an apocalyptic number.

It is an amenable number.

678695136 is an abundant number, since it is smaller than the sum of its proper divisors (1357392288).

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

678695136 is a wasteful number, since it uses less digits than its factorization.

678695136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009983 (or 1009975 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 678695136 is about 26051.7779815505. Note that the first 3 decimals coincide. The cubic root of 678695136 is about 878.8030973287.

The spelling of 678695136 in words is "six hundred seventy-eight million, six hundred ninety-five thousand, one hundred thirty-six".