139396860 has 36 divisors (see below), whose sum is σ = 422837688. Its totient is φ = 37172448.

The previous prime is 139396849. The next prime is 139396861. The reversal of 139396860 is 68693931.

139396860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139396861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387034 + ... + 387393.

Almost surely, 2^139396860 is an apocalyptic number.

139396860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139396860 is an abundant number, since it is smaller than the sum of its proper divisors (283440828).

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

139396860 is a wasteful number, since it uses less digits than its factorization.

139396860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774442 (or 774437 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 139396860 is about 11806.6447392983. The cubic root of 139396860 is about 518.5026699225.

The spelling of 139396860 in words is "one hundred thirty-nine million, three hundred ninety-six thousand, eight hundred sixty".