390221446 has 8 divisors (see below), whose sum is σ = 586198800. Its totient is φ = 194821848.

The previous prime is 390221443. The next prime is 390221471. The reversal of 390221446 is 644122093.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390221441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142746 + ... + 145453.

It is an arithmetic number, because the mean of its divisors is an integer number (73274850).

Almost surely, 2^390221446 is an apocalyptic number.

390221446 is a deficient number, since it is larger than the sum of its proper divisors (195977354).

390221446 is a wasteful number, since it uses less digits than its factorization.

390221446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288878.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 390221446 is about 19754.0235395223. The cubic root of 390221446 is about 730.7526146835.

The spelling of 390221446 in words is "three hundred ninety million, two hundred twenty-one thousand, four hundred forty-six".