390247428 has 48 divisors (see below), whose sum is σ = 923763456. Its totient is φ = 128213280.

The previous prime is 390247423. The next prime is 390247469. The reversal of 390247428 is 824742093.

It is not an unprimeable number, because it can be changed into a prime (390247423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255475 + ... + 256997.

It is an arithmetic number, because the mean of its divisors is an integer number (19245072).

Almost surely, 2^390247428 is an apocalyptic number.

It is an amenable number.

390247428 is an abundant number, since it is smaller than the sum of its proper divisors (533516028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390247428 is a wasteful number, since it uses less digits than its factorization.

390247428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 390247428 is about 19754.6811667513. The cubic root of 390247428 is about 730.7688328192.

The spelling of 390247428 in words is "three hundred ninety million, two hundred forty-seven thousand, four hundred twenty-eight".