139000836 has 48 divisors (see below), whose sum is σ = 351134784. Its totient is φ = 42542976.

The previous prime is 139000831. The next prime is 139000837. The reversal of 139000836 is 638000931.

It is not an unprimeable number, because it can be changed into a prime (139000831) 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, 28471 + ... + 32993.

It is an arithmetic number, because the mean of its divisors is an integer number (7315308).

Almost surely, 2^139000836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139000836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175567392).

139000836 is an abundant number, since it is smaller than the sum of its proper divisors (212133948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139000836 is a wasteful number, since it uses less digits than its factorization.

139000836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740 (or 4738 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 139000836 is about 11789.8615767955. The cubic root of 139000836 is about 518.0111852407.

The spelling of 139000836 in words is "one hundred thirty-nine million, eight hundred thirty-six", and thus it is an aban number.