390341788 has 12 divisors (see below), whose sum is σ = 698984440. Its totient is φ = 190631952.

The previous prime is 390341747. The next prime is 390341789. The reversal of 390341788 is 887143093.

It is a happy number.

It is a super-2 number, since 2×390341788² = 304733422918073888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390341789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134543 + ... + 1134886.

Almost surely, 2^390341788 is an apocalyptic number.

It is an amenable number.

390341788 is a deficient number, since it is larger than the sum of its proper divisors (308642652).

390341788 is a wasteful number, since it uses less digits than its factorization.

390341788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269476 (or 2269474 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 390341788 is about 19757.0693170824. The cubic root of 390341788 is about 730.8277268995.

The spelling of 390341788 in words is "three hundred ninety million, three hundred forty-one thousand, seven hundred eighty-eight".