385177138 has 4 divisors (see below), whose sum is σ = 577765710. Its totient is φ = 192588568.

The previous prime is 385177123. The next prime is 385177207. The reversal of 385177138 is 831771583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831771583 = 9689 ⋅85847.

It can be written as a sum of positive squares in only one way, i.e., 241584849 + 143592289 = 15543^2 + 11983^2 .

It is a super-2 number, since 2×385177138² = 296722855275742088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 385177094 and 385177103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96294283 + ... + 96294286.

Almost surely, 2^385177138 is an apocalyptic number.

385177138 is a deficient number, since it is larger than the sum of its proper divisors (192588572).

385177138 is a wasteful number, since it uses less digits than its factorization.

385177138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192588571.

The product of its digits is 141120, while the sum is 43.

The square root of 385177138 is about 19625.9302454686. The cubic root of 385177138 is about 727.5901884307.

The spelling of 385177138 in words is "three hundred eighty-five million, one hundred seventy-seven thousand, one hundred thirty-eight".