139888632 has 64 divisors (see below), whose sum is σ = 385418880. Its totient is φ = 42037632.

The previous prime is 139888603. The next prime is 139888649. The reversal of 139888632 is 236888931.

139888632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8203 + ... + 18629.

It is an arithmetic number, because the mean of its divisors is an integer number (6022170).

Almost surely, 2^139888632 is an apocalyptic number.

139888632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139888632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192709440).

139888632 is an abundant number, since it is smaller than the sum of its proper divisors (245530248).

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

139888632 is a wasteful number, since it uses less digits than its factorization.

139888632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492 (or 10488 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 139888632 is about 11827.4524729546. The cubic root of 139888632 is about 519.1116884975. Note that the first 3 decimals are identical.

The spelling of 139888632 in words is "one hundred thirty-nine million, eight hundred eighty-eight thousand, six hundred thirty-two".