139228038 has 16 divisors (see below), whose sum is σ = 309395760. Its totient is φ = 46409328.

The previous prime is 139228027. The next prime is 139228081. The reversal of 139228038 is 830822931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 139227993 and 139228011.

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, 1289095 + ... + 1289202.

It is an arithmetic number, because the mean of its divisors is an integer number (19337235).

Almost surely, 2^139228038 is an apocalyptic number.

139228038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139228038 is an abundant number, since it is smaller than the sum of its proper divisors (170167722).

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

139228038 is a wasteful number, since it uses less digits than its factorization.

139228038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578308 (or 2578302 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 139228038 is about 11799.4931247067. The cubic root of 139228038 is about 518.2932677429.

The spelling of 139228038 in words is "one hundred thirty-nine million, two hundred twenty-eight thousand, thirty-eight".