139854728 has 32 divisors (see below), whose sum is σ = 286628160. Its totient is φ = 63581760.

The previous prime is 139854707. The next prime is 139854749. The reversal of 139854728 is 827458931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139854707) and next prime (139854749).

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, 3068 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (8957130).

Almost surely, 2^139854728 is an apocalyptic number.

It is an amenable number.

139854728 is an abundant number, since it is smaller than the sum of its proper divisors (146773432).

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

139854728 is a wasteful number, since it uses less digits than its factorization.

139854728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20157 (or 20153 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 139854728 is about 11826.0191104192. The cubic root of 139854728 is about 519.0697470747.

The spelling of 139854728 in words is "one hundred thirty-nine million, eight hundred fifty-four thousand, seven hundred twenty-eight".