138402832 has 40 divisors (see below), whose sum is σ = 274669920. Its totient is φ = 67541760.

The previous prime is 138402793. The next prime is 138402833. The reversal of 138402832 is 238204831.

It is a junction number, because it is equal to n+sod(n) for n = 138402794 and 138402803.

It is not an unprimeable number, because it can be changed into a prime (138402833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117607 + ... + 118777.

It is an arithmetic number, because the mean of its divisors is an integer number (6866748).

Almost surely, 2^138402832 is an apocalyptic number.

It is an amenable number.

138402832 is a deficient number, since it is larger than the sum of its proper divisors (136267088).

138402832 is a wasteful number, since it uses less digits than its factorization.

138402832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 138402832 is about 11764.4732988774. The cubic root of 138402832 is about 517.2672615221.

The spelling of 138402832 in words is "one hundred thirty-eight million, four hundred two thousand, eight hundred thirty-two".