139398460 has 12 divisors (see below), whose sum is σ = 292736808. Its totient is φ = 55759376.

The previous prime is 139398451. The next prime is 139398461. The reversal of 139398460 is 64893931.

139398460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139398461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3484942 + ... + 3484981.

It is an arithmetic number, because the mean of its divisors is an integer number (24394734).

Almost surely, 2^139398460 is an apocalyptic number.

139398460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139398460 is an abundant number, since it is smaller than the sum of its proper divisors (153338348).

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

139398460 is a wasteful number, since it uses less digits than its factorization.

139398460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969932 (or 6969930 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 139398460 is about 11806.7124975583. The cubic root of 139398460 is about 518.5046537096.

The spelling of 139398460 in words is "one hundred thirty-nine million, three hundred ninety-eight thousand, four hundred sixty".