139311432 has 108 divisors (see below), whose sum is σ = 412411545. Its totient is φ = 42464448.

The previous prime is 139311353. The next prime is 139311451. The reversal of 139311432 is 234113931.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 119115396 + 20196036 = 10914^2 + 4494^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8346.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 139311396 and 139311405.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1301923 + ... + 1302029.

Almost surely, 2^139311432 is an apocalyptic number.

139311432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139311432

139311432 is an abundant number, since it is smaller than the sum of its proper divisors (273100113).

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

139311432 is a wasteful number, since it uses less digits than its factorization.

139311432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 125 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 139311432 is about 11803.0263915659. The cubic root of 139311432 is about 518.3967285173.

The spelling of 139311432 in words is "one hundred thirty-nine million, three hundred eleven thousand, four hundred thirty-two".