138876385 has 8 divisors (see below), whose sum is σ = 166749480. Its totient is φ = 111035904.

The previous prime is 138876341. The next prime is 138876427. The reversal of 138876385 is 583678831.

It can be written as a sum of positive squares in 4 ways, for example, as 28121809 + 110754576 = 5303^2 + 10524^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138876385 - 2¹³ = 138868193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2481 + ... + 16849.

It is an arithmetic number, because the mean of its divisors is an integer number (20843685).

Almost surely, 2^138876385 is an apocalyptic number.

It is an amenable number.

138876385 is a deficient number, since it is larger than the sum of its proper divisors (27873095).

138876385 is a wasteful number, since it uses less digits than its factorization.

138876385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16307.

The product of its digits is 967680, while the sum is 49.

The square root of 138876385 is about 11784.5825127579. The cubic root of 138876385 is about 517.8565428632.

The spelling of 138876385 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, three hundred eighty-five".