320762138 has 4 divisors (see below), whose sum is σ = 481143210. Its totient is φ = 160381068.

The previous prime is 320762131. The next prime is 320762149. The reversal of 320762138 is 831267023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831267023 = 229 ⋅3629987.

It can be written as a sum of positive squares in only one way, i.e., 208889209 + 111872929 = 14453^2 + 10577^2 .

It is not an unprimeable number, because it can be changed into a prime (320762131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80190533 + ... + 80190536.

Almost surely, 2^320762138 is an apocalyptic number.

320762138 is a deficient number, since it is larger than the sum of its proper divisors (160381072).

320762138 is a wasteful number, since it uses less digits than its factorization.

320762138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160381071.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 320762138 is about 17909.8335558988. The cubic root of 320762138 is about 684.5329638301.

The spelling of 320762138 in words is "three hundred twenty million, seven hundred sixty-two thousand, one hundred thirty-eight".