138628963 has 16 divisors (see below), whose sum is σ = 155496960. Its totient is φ = 122522400.

The previous prime is 138628957. The next prime is 138628967. The reversal of 138628963 is 369826831.

It is a de Polignac number, because none of the positive numbers 2^k-138628963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138628967) 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 15 ways as a sum of consecutive naturals, for example, 57033 + ... + 59413.

It is an arithmetic number, because the mean of its divisors is an integer number (9718560).

Almost surely, 2^138628963 is an apocalyptic number.

138628963 is a deficient number, since it is larger than the sum of its proper divisors (16867997).

138628963 is a wasteful number, since it uses less digits than its factorization.

138628963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538.

The product of its digits is 373248, while the sum is 46.

The square root of 138628963 is about 11774.0801339213. The cubic root of 138628963 is about 517.5488225154.

The spelling of 138628963 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, nine hundred sixty-three".