138802389 has 32 divisors (see below), whose sum is σ = 209236608. Its totient is φ = 81120000.

The previous prime is 138802387. The next prime is 138802393. The reversal of 138802389 is 983208831.

138802389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138802389 - 2¹ = 138802387 is a prime.

It is a super-2 number, since 2×138802389² = 38532206384214642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138802389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138802387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106039 + ... + 107339.

It is an arithmetic number, because the mean of its divisors is an integer number (6538644).

Almost surely, 2^138802389 is an apocalyptic number.

It is an amenable number.

138802389 is a deficient number, since it is larger than the sum of its proper divisors (70434219).

138802389 is a wasteful number, since it uses less digits than its factorization.

138802389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 138802389 is about 11781.4425687180. The cubic root of 138802389 is about 517.7645518922.

The spelling of 138802389 in words is "one hundred thirty-eight million, eight hundred two thousand, three hundred eighty-nine".