139538888 has 16 divisors (see below), whose sum is σ = 275406000. Its totient is φ = 66097296.

The previous prime is 139538887. The next prime is 139538891. The reversal of 139538888 is 888835931.

It is a super-2 number, since 2×139538888² = 38942202528553088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139538881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458858 + ... + 459161.

It is an arithmetic number, because the mean of its divisors is an integer number (17212875).

Almost surely, 2^139538888 is an apocalyptic number.

It is an amenable number.

139538888 is a deficient number, since it is larger than the sum of its proper divisors (135867112).

139538888 is a wasteful number, since it uses less digits than its factorization.

139538888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918044 (or 918040 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 53.

The square root of 139538888 is about 11812.6579566159. The cubic root of 139538888 is about 518.6787066489.

The spelling of 139538888 in words is "one hundred thirty-nine million, five hundred thirty-eight thousand, eight hundred eighty-eight".