139986432 has 120 divisors (see below), whose sum is σ = 428015016. Its totient is φ = 43892736.

The previous prime is 139986419. The next prime is 139986437. The reversal of 139986432 is 234689931.

It is a happy number.

139986432 is a `hidden beast` number, since 139 + 9 + 86 + 432 = 666.

It is a super-2 number, since 2×139986432² = 39192402288181248, which contains 22 as substring.

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 (139986437) 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, 77443 + ... + 79229.

Almost surely, 2^139986432 is an apocalyptic number.

139986432 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 139986432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214007508).

139986432 is an abundant number, since it is smaller than the sum of its proper divisors (288028584).

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

139986432 is a wasteful number, since it uses less digits than its factorization.

139986432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 1809 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 139986432 is about 11831.5861996606. The cubic root of 139986432 is about 519.2326354146.

The spelling of 139986432 in words is "one hundred thirty-nine million, nine hundred eighty-six thousand, four hundred thirty-two".