139311228 has 48 divisors (see below), whose sum is σ = 380145920. Its totient is φ = 38876544.

The previous prime is 139311217. The next prime is 139311239. The reversal of 139311228 is 822113931.

139311228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139311217) and next prime (139311239).

It is a junction number, because it is equal to n+sod(n) for n = 139311195 and 139311204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15673 + ... + 22896.

Almost surely, 2^139311228 is an apocalyptic number.

It is an amenable number.

139311228 is an abundant number, since it is smaller than the sum of its proper divisors (240834692).

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

139311228 is a wasteful number, since it uses less digits than its factorization.

139311228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38626 (or 38624 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 139311228 is about 11803.0177497113. The cubic root of 139311228 is about 518.3964754800.

It can be divided in two parts, 1393 and 11228, that added together give a palindrome (12621).

The spelling of 139311228 in words is "one hundred thirty-nine million, three hundred eleven thousand, two hundred twenty-eight".