68515128 has 48 divisors (see below), whose sum is σ = 202433400. Its totient is φ = 20761920.

The previous prime is 68515127. The next prime is 68515163. The reversal of 68515128 is 82151586.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68515092 and 68515101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68515123) 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, 42463 + ... + 44046.

Almost surely, 2^68515128 is an apocalyptic number.

It is an amenable number.

68515128 is an abundant number, since it is smaller than the sum of its proper divisors (133918272).

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

68515128 is a wasteful number, since it uses less digits than its factorization.

68515128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86532 (or 86525 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 68515128 is about 8277.3865440730. The cubic root of 68515128 is about 409.1935924327.

The spelling of 68515128 in words is "sixty-eight million, five hundred fifteen thousand, one hundred twenty-eight".