390936188 has 6 divisors (see below), whose sum is σ = 684138336. Its totient is φ = 195468092.

The previous prime is 390936187. The next prime is 390936197. The reversal of 390936188 is 881639093.

It is a super-2 number, since 2×390936188² = 305662206175942688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390936181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48867020 + ... + 48867027.

It is an arithmetic number, because the mean of its divisors is an integer number (114023056).

Almost surely, 2^390936188 is an apocalyptic number.

It is an amenable number.

390936188 is a deficient number, since it is larger than the sum of its proper divisors (293202148).

390936188 is a wasteful number, since it uses less digits than its factorization.

390936188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97734051 (or 97734049 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 390936188 is about 19772.1063116705. The cubic root of 390936188 is about 731.1984991319.

The spelling of 390936188 in words is "three hundred ninety million, nine hundred thirty-six thousand, one hundred eighty-eight".