390303890 has 16 divisors (see below), whose sum is σ = 739523520. Its totient is φ = 147904560.

The previous prime is 390303863. The next prime is 390303911. The reversal of 390303890 is 98303093.

It is a self number, because there is not a number n which added to its sum of digits gives 390303890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026926 + ... + 1027305.

It is an arithmetic number, because the mean of its divisors is an integer number (46220220).

Almost surely, 2^390303890 is an apocalyptic number.

390303890 is a deficient number, since it is larger than the sum of its proper divisors (349219630).

390303890 is a wasteful number, since it uses less digits than its factorization.

390303890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054257.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 390303890 is about 19756.1101940640. The cubic root of 390303890 is about 730.8040742900.

It can be divided in two parts, 390303 and 890, that added together give a palindrome (391193).

The spelling of 390303890 in words is "three hundred ninety million, three hundred three thousand, eight hundred ninety".