138667528 has 32 divisors (see below), whose sum is σ = 263531520. Its totient is φ = 68400000.

The previous prime is 138667517. The next prime is 138667537. The reversal of 138667528 is 825766831.

Its product of digits (483840) is a multiple of the sum of its prime divisors (945).

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, 230428 + ... + 231028.

It is an arithmetic number, because the mean of its divisors is an integer number (8235360).

Almost surely, 2^138667528 is an apocalyptic number.

It is an amenable number.

138667528 is a deficient number, since it is larger than the sum of its proper divisors (124863992).

138667528 is a wasteful number, since it uses less digits than its factorization.

138667528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 945 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 138667528 is about 11775.7177275952. The cubic root of 138667528 is about 517.5968101301.

The spelling of 138667528 in words is "one hundred thirty-eight million, six hundred sixty-seven thousand, five hundred twenty-eight".