139239764 has 24 divisors (see below), whose sum is σ = 249177600. Its totient is φ = 68059520.

The previous prime is 139239743. The next prime is 139239811. The reversal of 139239764 is 467932931.

It is a congruent number.

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, 43532 + ... + 46620.

It is an arithmetic number, because the mean of its divisors is an integer number (10382400).

Almost surely, 2^139239764 is an apocalyptic number.

It is an amenable number.

139239764 is a deficient number, since it is larger than the sum of its proper divisors (109937836).

139239764 is a wasteful number, since it uses less digits than its factorization.

139239764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3341 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 139239764 is about 11799.9899999958. The cubic root of 139239764 is about 518.3078178204.

It can be divided in two parts, 139239 and 764, that multiplied together give a square (106378596 = 10314²).

The spelling of 139239764 in words is "one hundred thirty-nine million, two hundred thirty-nine thousand, seven hundred sixty-four".