390843387 has 48 divisors (see below), whose sum is σ = 647756928. Its totient is φ = 233513280.

The previous prime is 390843377. The next prime is 390843391. The reversal of 390843387 is 783348093.

It is a happy number.

It is not a de Polignac number, because 390843387 - 2¹⁵ = 390810619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390843377) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194128 + ... + 196130.

It is an arithmetic number, because the mean of its divisors is an integer number (13494936).

Almost surely, 2^390843387 is an apocalyptic number.

390843387 is a deficient number, since it is larger than the sum of its proper divisors (256913541).

390843387 is a wasteful number, since it uses less digits than its factorization.

390843387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102 (or 2090 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 390843387 is about 19769.7594067303. The cubic root of 390843387 is about 731.1406368993.

The spelling of 390843387 in words is "three hundred ninety million, eight hundred forty-three thousand, three hundred eighty-seven".