139961952 has 192 divisors, whose sum is σ = 466119360. Its totient is φ = 40476672.

The previous prime is 139961933. The next prime is 139961957. The reversal of 139961952 is 259169931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 139961898 and 139961907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139961957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190578 + ... + 191310.

It is an arithmetic number, because the mean of its divisors is an integer number (2427705).

Almost surely, 2^139961952 is an apocalyptic number.

139961952 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 139961952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233059680).

139961952 is an abundant number, since it is smaller than the sum of its proper divisors (326157408).

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

139961952 is a wasteful number, since it uses less digits than its factorization.

139961952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 768 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 139961952 is about 11830.5516354902. The cubic root of 139961952 is about 519.2023668718.

The spelling of 139961952 in words is "one hundred thirty-nine million, nine hundred sixty-one thousand, nine hundred fifty-two".