139997832 has 64 divisors (see below), whose sum is σ = 378060480. Its totient is φ = 42945792.

The previous prime is 139997831. The next prime is 139997861. The reversal of 139997832 is 238799931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (139997831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175258 + ... + 176054.

It is an arithmetic number, because the mean of its divisors is an integer number (5907195).

Almost surely, 2^139997832 is an apocalyptic number.

139997832 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 139997832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189030240).

139997832 is an abundant number, since it is smaller than the sum of its proper divisors (238062648).

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

139997832 is a wasteful number, since it uses less digits than its factorization.

139997832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1378 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 139997832 is about 11832.0679511233. The cubic root of 139997832 is about 519.2467298553.

The spelling of 139997832 in words is "one hundred thirty-nine million, nine hundred ninety-seven thousand, eight hundred thirty-two".