69136428 has 24 divisors (see below), whose sum is σ = 161510832. Its totient is φ = 23017984.

The previous prime is 69136409. The next prime is 69136439. The reversal of 69136428 is 82463196.

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, 8776 + ... + 14672.

It is an arithmetic number, because the mean of its divisors is an integer number (6729618).

Almost surely, 2^69136428 is an apocalyptic number.

It is an amenable number.

69136428 is an abundant number, since it is smaller than the sum of its proper divisors (92374404).

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

69136428 is a wasteful number, since it uses less digits than its factorization.

69136428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6881 (or 6879 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 69136428 is about 8314.8318082809. The cubic root of 69136428 is about 410.4267379195.

The spelling of 69136428 in words is "sixty-nine million, one hundred thirty-six thousand, four hundred twenty-eight".