139632816 has 80 divisors (see below), whose sum is σ = 381404160. Its totient is φ = 43929600.

The previous prime is 139632799. The next prime is 139632821. The reversal of 139632816 is 618236931.

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, 86416 + ... + 88016.

It is an arithmetic number, because the mean of its divisors is an integer number (4767552).

Almost surely, 2^139632816 is an apocalyptic number.

139632816 is a gapful number since it is divisible by the number (16) 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 139632816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190702080).

139632816 is an abundant number, since it is smaller than the sum of its proper divisors (241771344).

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

139632816 is a wasteful number, since it uses less digits than its factorization.

139632816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714 (or 1708 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 139632816 is about 11816.6330229892. The cubic root of 139632816 is about 518.7950601783.

The spelling of 139632816 in words is "one hundred thirty-nine million, six hundred thirty-two thousand, eight hundred sixteen".