139805952 has 288 divisors, whose sum is σ = 467013120. Its totient is φ = 36495360.

The previous prime is 139805929. The next prime is 139805957. The reversal of 139805952 is 259508931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139805957) 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, 2086623 + ... + 2086689.

Almost surely, 2^139805952 is an apocalyptic number.

139805952 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 139805952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233506560).

139805952 is an abundant number, since it is smaller than the sum of its proper divisors (327207168).

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

139805952 is a wasteful number, since it uses less digits than its factorization.

139805952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 139805952 is about 11823.9566981616. The cubic root of 139805952 is about 519.0093961419.

The spelling of 139805952 in words is "one hundred thirty-nine million, eight hundred five thousand, nine hundred fifty-two".