139643712 has 168 divisors, whose sum is σ = 456825096. Its totient is φ = 40402944.

The previous prime is 139643683. The next prime is 139643717. The reversal of 139643712 is 217346931.

139643712 is a `hidden beast` number, since 1 + 3 + 9 + 643 + 7 + 1 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7485696 + 132158016 = 2736^2 + 11496^2 .

It is a super-2 number, since 2×139643712² = 39000732602277888, which contains 22 as substring.

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 (139643717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126748 + ... + 127844.

It is an arithmetic number, because the mean of its divisors is an integer number (2719197).

Almost surely, 2^139643712 is an apocalyptic number.

139643712 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 139643712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228412548).

139643712 is an abundant number, since it is smaller than the sum of its proper divisors (317181384).

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

139643712 is a wasteful number, since it uses less digits than its factorization.

139643712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1132 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 139643712 is about 11817.0940590316. The cubic root of 139643712 is about 518.8085542459.

The spelling of 139643712 in words is "one hundred thirty-nine million, six hundred forty-three thousand, seven hundred twelve".