139216784 has 80 divisors (see below), whose sum is σ = 322169856. Its totient is φ = 57024000.

The previous prime is 139216751. The next prime is 139216787. The reversal of 139216784 is 487612931.

It is not an unprimeable number, because it can be changed into a prime (139216787) 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, 350474 + ... + 350870.

Almost surely, 2^139216784 is an apocalyptic number.

139216784 is a gapful number since it is divisible by the number (14) 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 139216784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161084928).

139216784 is an abundant number, since it is smaller than the sum of its proper divisors (182953072).

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

139216784 is a wasteful number, since it uses less digits than its factorization.

139216784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 538 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 139216784 is about 11799.0162301778. The cubic root of 139216784 is about 518.2793025730.

The spelling of 139216784 in words is "one hundred thirty-nine million, two hundred sixteen thousand, seven hundred eighty-four".