139400836 has 12 divisors (see below), whose sum is σ = 244047580. Its totient is φ = 69672960.

The previous prime is 139400827. The next prime is 139400837. The reversal of 139400836 is 638004931.

It can be written as a sum of positive squares in 2 ways, for example, as 49984900 + 89415936 = 7070^2 + 9456^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (139400837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8260 + ... + 18628.

Almost surely, 2^139400836 is an apocalyptic number.

It is an amenable number.

139400836 is a deficient number, since it is larger than the sum of its proper divisors (104646744).

139400836 is a wasteful number, since it uses less digits than its factorization.

139400836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13734 (or 13732 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 139400836 is about 11806.8131178570. The cubic root of 139400836 is about 518.5075996055.

The spelling of 139400836 in words is "one hundred thirty-nine million, four hundred thousand, eight hundred thirty-six".