139390370 has 32 divisors (see below), whose sum is σ = 287539200. Its totient is φ = 47658816.

The previous prime is 139390367. The next prime is 139390379. The reversal of 139390370 is 73093931.

It is a happy number.

139390370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 139390370.

It is not an unprimeable number, because it can be changed into a prime (139390379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24671 + ... + 29789.

It is an arithmetic number, because the mean of its divisors is an integer number (8985600).

Almost surely, 2^139390370 is an apocalyptic number.

139390370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139390370 is an abundant number, since it is smaller than the sum of its proper divisors (148148830).

139390370 is a wasteful number, since it uses less digits than its factorization.

139390370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 139390370 is about 11806.3698908682. The cubic root of 139390370 is about 518.4946230302.

The spelling of 139390370 in words is "one hundred thirty-nine million, three hundred ninety thousand, three hundred seventy".