139166352 has 120 divisors (see below), whose sum is σ = 444205944. Its totient is φ = 40292352.

The previous prime is 139166351. The next prime is 139166387. The reversal of 139166352 is 253661931.

139166352 is a `hidden beast` number, since 1 + 3 + 9 + 16 + 635 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19395216 + 119771136 = 4404^2 + 10944^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (139166351) 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, 29638 + ... + 34010.

Almost surely, 2^139166352 is an apocalyptic number.

139166352 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 139166352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222102972).

139166352 is an abundant number, since it is smaller than the sum of its proper divisors (305039592).

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

139166352 is a wasteful number, since it uses less digits than its factorization.

139166352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417 (or 4408 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 139166352 is about 11796.8789092709. The cubic root of 139166352 is about 518.2167118952.

The spelling of 139166352 in words is "one hundred thirty-nine million, one hundred sixty-six thousand, three hundred fifty-two".