678513136 has 40 divisors (see below), whose sum is σ = 1505002880. Its totient is φ = 290291904.

The previous prime is 678513107. The next prime is 678513137. The reversal of 678513136 is 631315876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678513137) 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, 64435 + ... + 74221.

It is an arithmetic number, because the mean of its divisors is an integer number (37625072).

Almost surely, 2^678513136 is an apocalyptic number.

It is an amenable number.

678513136 is an abundant number, since it is smaller than the sum of its proper divisors (826489744).

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

678513136 is a wasteful number, since it uses less digits than its factorization.

678513136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421 (or 10415 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 678513136 is about 26048.2847036038. The cubic root of 678513136 is about 878.7245365463.

The spelling of 678513136 in words is "six hundred seventy-eight million, five hundred thirteen thousand, one hundred thirty-six".