390279146 has 4 divisors (see below), whose sum is σ = 585418722. Its totient is φ = 195139572.

The previous prime is 390279143. The next prime is 390279191. The reversal of 390279146 is 641972093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388523521 + 1755625 = 19711^2 + 1325^2 .

It is not an unprimeable number, because it can be changed into a prime (390279143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97569785 + ... + 97569788.

Almost surely, 2^390279146 is an apocalyptic number.

390279146 is a deficient number, since it is larger than the sum of its proper divisors (195139576).

390279146 is a wasteful number, since it uses less digits than its factorization.

390279146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195139575.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 390279146 is about 19755.4839475018. The cubic root of 390279146 is about 730.7886304281.

The spelling of 390279146 in words is "three hundred ninety million, two hundred seventy-nine thousand, one hundred forty-six".