139224384 has 84 divisors (see below), whose sum is σ = 429781716. Its totient is φ = 42835968.

The previous prime is 139224383. The next prime is 139224401. The reversal of 139224384 is 483422931.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 90782784 = 6960^2 + 9528^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139224383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1809 + ... + 16784.

It is an arithmetic number, because the mean of its divisors is an integer number (5116449).

Almost surely, 2^139224384 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 139224384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214890858).

139224384 is an abundant number, since it is smaller than the sum of its proper divisors (290557332).

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

139224384 is a wasteful number, since it uses less digits than its factorization.

139224384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18624 (or 18611 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 139224384 is about 11799.3382865312. The cubic root of 139224384 is about 518.2887335504.

The spelling of 139224384 in words is "one hundred thirty-nine million, two hundred twenty-four thousand, three hundred eighty-four".