139042808 has 32 divisors (see below), whose sum is σ = 270768960. Its totient is φ = 66885120.

The previous prime is 139042793. The next prime is 139042819. The reversal of 139042808 is 808240931.

It is a happy number.

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, 21041 + ... + 26847.

It is an arithmetic number, because the mean of its divisors is an integer number (8461530).

Almost surely, 2^139042808 is an apocalyptic number.

It is an amenable number.

139042808 is a deficient number, since it is larger than the sum of its proper divisors (131726152).

139042808 is a wasteful number, since it uses less digits than its factorization.

139042808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927 (or 5923 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 139042808 is about 11791.6414463806. The cubic root of 139042808 is about 518.0633186861.

The spelling of 139042808 in words is "one hundred thirty-nine million, forty-two thousand, eight hundred eight".