139954892 has 72 divisors (see below), whose sum is σ = 311475360. Its totient is φ = 53856000.

The previous prime is 139954891. The next prime is 139954901. The reversal of 139954892 is 298459931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 139954892.

It is not an unprimeable number, because it can be changed into a prime (139954891) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 341984 + ... + 342392.

Almost surely, 2^139954892 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 139954892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155737680).

139954892 is an abundant number, since it is smaller than the sum of its proper divisors (171520468).

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

139954892 is a wasteful number, since it uses less digits than its factorization.

139954892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 530 counting only the distinct ones).

The product of its digits is 699840, while the sum is 50.

The square root of 139954892 is about 11830.2532517271. The cubic root of 139954892 is about 519.1936368080.

The spelling of 139954892 in words is "one hundred thirty-nine million, nine hundred fifty-four thousand, eight hundred ninety-two".