139432032 has 144 divisors (see below), whose sum is σ = 423783360. Its totient is φ = 43358976.

The previous prime is 139432019. The next prime is 139432039. The reversal of 139432032 is 230234931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 139431987 and 139432005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139432039) 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, 454023 + ... + 454329.

It is an arithmetic number, because the mean of its divisors is an integer number (2942940).

Almost surely, 2^139432032 is an apocalyptic number.

139432032 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 139432032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211891680).

139432032 is an abundant number, since it is smaller than the sum of its proper divisors (284351328).

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

139432032 is a wasteful number, since it uses less digits than its factorization.

139432032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 139432032 is about 11808.1341455795. The cubic root of 139432032 is about 518.5462750231.

Adding to 139432032 its reverse (230234931), we get a palindrome (369666963).

The spelling of 139432032 in words is "one hundred thirty-nine million, four hundred thirty-two thousand, thirty-two".