68678538 has 24 divisors (see below), whose sum is σ = 145915872. Its totient is φ = 21545664.

The previous prime is 68678531. The next prime is 68678539. The reversal of 68678538 is 83587686.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (68678531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18070 + ... + 21537.

It is an arithmetic number, because the mean of its divisors is an integer number (6079828).

Almost surely, 2^68678538 is an apocalyptic number.

68678538 is an abundant number, since it is smaller than the sum of its proper divisors (77237334).

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

68678538 is a wasteful number, since it uses less digits than its factorization.

68678538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39646 (or 39629 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 68678538 is about 8287.2515347370. The cubic root of 68678538 is about 409.5186458821.

The spelling of 68678538 in words is "sixty-eight million, six hundred seventy-eight thousand, five hundred thirty-eight".