390900257 has 8 divisors (see below), whose sum is σ = 426643200. Its totient is φ = 355191760.

The previous prime is 390900253. The next prime is 390900271. The reversal of 390900257 is 752009093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390900257 - 2² = 390900253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390900253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18983 + ... + 33795.

It is an arithmetic number, because the mean of its divisors is an integer number (53330400).

Almost surely, 2^390900257 is an apocalyptic number.

It is an amenable number.

390900257 is a deficient number, since it is larger than the sum of its proper divisors (35742943).

390900257 is a wasteful number, since it uses less digits than its factorization.

390900257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17223.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 390900257 is about 19771.1976622561. The cubic root of 390900257 is about 731.1760969266.

The spelling of 390900257 in words is "three hundred ninety million, nine hundred thousand, two hundred fifty-seven".