139455928 has 16 divisors (see below), whose sum is σ = 265163760. Its totient is φ = 68745600.

The previous prime is 139455917. The next prime is 139455929. The reversal of 139455928 is 829554931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139455929) 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, 122193 + ... + 123328.

It is an arithmetic number, because the mean of its divisors is an integer number (16572735).

Almost surely, 2^139455928 is an apocalyptic number.

It is an amenable number.

139455928 is a deficient number, since it is larger than the sum of its proper divisors (125707832).

139455928 is a wasteful number, since it uses less digits than its factorization.

139455928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245598 (or 245594 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The square root of 139455928 is about 11809.1459471039. The cubic root of 139455928 is about 518.5758963227.

The spelling of 139455928 in words is "one hundred thirty-nine million, four hundred fifty-five thousand, nine hundred twenty-eight".