139668830 has 32 divisors (see below), whose sum is σ = 287884800. Its totient is φ = 47792160.

The previous prime is 139668827. The next prime is 139668847. The reversal of 139668830 is 38866931.

139668830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 40265 + ... + 43595.

It is an arithmetic number, because the mean of its divisors is an integer number (8996400).

Almost surely, 2^139668830 is an apocalyptic number.

139668830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139668830 is an abundant number, since it is smaller than the sum of its proper divisors (148215970).

139668830 is a wasteful number, since it uses less digits than its factorization.

139668830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 139668830 is about 11818.1567936798. The cubic root of 139668830 is about 518.8396587661.

The spelling of 139668830 in words is "one hundred thirty-nine million, six hundred sixty-eight thousand, eight hundred thirty".