390197090 has 32 divisors (see below), whose sum is σ = 756293760. Its totient is φ = 144404224.

The previous prime is 390197029. The next prime is 390197099. The reversal of 390197090 is 90791093.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (390197099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9422 + ... + 29481.

It is an arithmetic number, because the mean of its divisors is an integer number (23634180).

Almost surely, 2^390197090 is an apocalyptic number.

390197090 is a deficient number, since it is larger than the sum of its proper divisors (366096670).

390197090 is a wasteful number, since it uses less digits than its factorization.

390197090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38986.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 390197090 is about 19753.4070478994. The cubic root of 390197090 is about 730.7374108540.

The spelling of 390197090 in words is "three hundred ninety million, one hundred ninety-seven thousand, ninety".