380906138 has 4 divisors (see below), whose sum is σ = 571359210. Its totient is φ = 190453068.

The previous prime is 380906137. The next prime is 380906219. The reversal of 380906138 is 831609083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831609083 = 911 ⋅912853.

It can be written as a sum of positive squares in only one way, i.e., 378419209 + 2486929 = 19453^2 + 1577^2 .

It is not an unprimeable number, because it can be changed into a prime (380906137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95226533 + ... + 95226536.

Almost surely, 2^380906138 is an apocalyptic number.

380906138 is a deficient number, since it is larger than the sum of its proper divisors (190453072).

380906138 is a wasteful number, since it uses less digits than its factorization.

380906138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190453071.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 380906138 is about 19516.8167998780. The cubic root of 380906138 is about 724.8909153357.

The spelling of 380906138 in words is "three hundred eighty million, nine hundred six thousand, one hundred thirty-eight".