3138687394 has 8 divisors (see below), whose sum is σ = 4756567788. Its totient is φ = 1553164800.

The previous prime is 3138687367. The next prime is 3138687403. The reversal of 3138687394 is 4937868313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2858292369 + 280395025 = 53463^2 + 16745^2 .

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

It is a super-2 number, since 2×3138687394² = 19702717114509022472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8089207 + ... + 8089594.

Almost surely, 2^3138687394 is an apocalyptic number.

3138687394 is a deficient number, since it is larger than the sum of its proper divisors (1617880394).

3138687394 is a wasteful number, since it uses less digits than its factorization.

3138687394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16178900.

The product of its digits is 2612736, while the sum is 52.

The square root of 3138687394 is about 56023.9894509486. The cubic root of 3138687394 is about 1464.1402767161.

The spelling of 3138687394 in words is "three billion, one hundred thirty-eight million, six hundred eighty-seven thousand, three hundred ninety-four".