139205952 has 84 divisors (see below), whose sum is σ = 413833056. Its totient is φ = 46396800.

The previous prime is 139205933. The next prime is 139205953. The reversal of 139205952 is 259502931.

It is a happy number.

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 (139205953) 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, 11077 + ... + 20027.

It is an arithmetic number, because the mean of its divisors is an integer number (4926584).

Almost surely, 2^139205952 is an apocalyptic number.

139205952 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 139205952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206916528).

139205952 is an abundant number, since it is smaller than the sum of its proper divisors (274627104).

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

139205952 is an frugal number, since it uses more digits than its factorization.

139205952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8978 (or 8956 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 139205952 is about 11798.5571999292. The cubic root of 139205952 is about 518.2658603551.

The spelling of 139205952 in words is "one hundred thirty-nine million, two hundred five thousand, nine hundred fifty-two".