139849956 has 144 divisors (see below), whose sum is σ = 407090880. Its totient is φ = 41368320.

The previous prime is 139849909. The next prime is 139849979. The reversal of 139849956 is 659948931.

139849956 is a `hidden beast` number, since 13 + 98 + 499 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 662691 + ... + 662901.

It is an arithmetic number, because the mean of its divisors is an integer number (2827020).

Almost surely, 2^139849956 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 139849956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203545440).

139849956 is an abundant number, since it is smaller than the sum of its proper divisors (267240924).

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

139849956 is a wasteful number, since it uses less digits than its factorization.

139849956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 252 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 139849956 is about 11825.8173501877. The cubic root of 139849956 is about 519.0638432605.

The spelling of 139849956 in words is "one hundred thirty-nine million, eight hundred forty-nine thousand, nine hundred fifty-six".