139402670 has 16 divisors (see below), whose sum is σ = 273736368. Its totient is φ = 50691840.

The previous prime is 139402657. The next prime is 139402699. The reversal of 139402670 is 76204931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633539 + ... + 633758.

It is an arithmetic number, because the mean of its divisors is an integer number (17108523).

Almost surely, 2^139402670 is an apocalyptic number.

139402670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139402670 is a deficient number, since it is larger than the sum of its proper divisors (134333698).

139402670 is a wasteful number, since it uses less digits than its factorization.

139402670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267315.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 139402670 is about 11806.8907846223. The cubic root of 139402670 is about 518.5098734771.

The spelling of 139402670 in words is "one hundred thirty-nine million, four hundred two thousand, six hundred seventy".