390666622 has 4 divisors (see below), whose sum is σ = 585999936. Its totient is φ = 195333310.

The previous prime is 390666593. The next prime is 390666623. The reversal of 390666622 is 226666093.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390666623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97666654 + ... + 97666657.

It is an arithmetic number, because the mean of its divisors is an integer number (146499984).

Almost surely, 2^390666622 is an apocalyptic number.

390666622 is a deficient number, since it is larger than the sum of its proper divisors (195333314).

390666622 is a wasteful number, since it uses less digits than its factorization.

390666622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195333313.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 390666622 is about 19765.2883105711. The cubic root of 390666622 is about 731.0303970373.

The spelling of 390666622 in words is "three hundred ninety million, six hundred sixty-six thousand, six hundred twenty-two".