139154388 has 24 divisors (see below), whose sum is σ = 324912000. Its totient is φ = 46353600.

The previous prime is 139154371. The next prime is 139154473. The reversal of 139154388 is 883451931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21088 + ... + 26888.

It is an arithmetic number, because the mean of its divisors is an integer number (13538000).

Almost surely, 2^139154388 is an apocalyptic number.

It is an amenable number.

139154388 is an abundant number, since it is smaller than the sum of its proper divisors (185757612).

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

139154388 is a wasteful number, since it uses less digits than its factorization.

139154388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807 (or 7805 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 139154388 is about 11796.3718150964. The cubic root of 139154388 is about 518.2018612690.

The spelling of 139154388 in words is "one hundred thirty-nine million, one hundred fifty-four thousand, three hundred eighty-eight".