139793784 has 32 divisors (see below), whose sum is σ = 376368720. Its totient is φ = 43013376.

The previous prime is 139793783. The next prime is 139793803. The reversal of 139793784 is 487397931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139793783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223717 + ... + 224340.

Almost surely, 2^139793784 is an apocalyptic number.

It is an amenable number.

139793784 is an abundant number, since it is smaller than the sum of its proper divisors (236574936).

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

139793784 is a wasteful number, since it uses less digits than its factorization.

139793784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448079 (or 448075 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 139793784 is about 11823.4421383961. The cubic root of 139793784 is about 518.9943383911.

The spelling of 139793784 in words is "one hundred thirty-nine million, seven hundred ninety-three thousand, seven hundred eighty-four".