139855236 has 12 divisors (see below), whose sum is σ = 326328912. Its totient is φ = 46618408.

The previous prime is 139855159. The next prime is 139855237. The reversal of 139855236 is 632558931.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (139855237) 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, 5827290 + ... + 5827313.

It is an arithmetic number, because the mean of its divisors is an integer number (27194076).

Almost surely, 2^139855236 is an apocalyptic number.

It is an amenable number.

139855236 is an abundant number, since it is smaller than the sum of its proper divisors (186473676).

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

139855236 is a wasteful number, since it uses less digits than its factorization.

139855236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11654610 (or 11654608 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 139855236 is about 11826.0405884641. The cubic root of 139855236 is about 519.0703755533.

The spelling of 139855236 in words is "one hundred thirty-nine million, eight hundred fifty-five thousand, two hundred thirty-six".