139924008 has 144 divisors (see below), whose sum is σ = 466963380. Its totient is φ = 37610496.

The previous prime is 139923997. The next prime is 139924009. The reversal of 139924008 is 800429931.

It can be written as a sum of positive squares in 2 ways, for example, as 139287204 + 636804 = 11802^2 + 798^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139924009) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 58810 + ... + 61142.

Almost surely, 2^139924008 is an apocalyptic number.

139924008 is a gapful number since it is divisible by the number (18) 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 139924008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233481690).

139924008 is an abundant number, since it is smaller than the sum of its proper divisors (327039372).

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

139924008 is a wasteful number, since it uses less digits than its factorization.

139924008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 139924008 is about 11828.9478822083. The cubic root of 139924008 is about 519.1554436548.

The spelling of 139924008 in words is "one hundred thirty-nine million, nine hundred twenty-four thousand, eight".