255330390 has 32 divisors (see below), whose sum is σ = 700335360. Its totient is φ = 58361184.

The previous prime is 255330389. The next prime is 255330391. The reversal of 255330390 is 93033552.

It is an interprime number because it is at equal distance from previous prime (255330389) and next prime (255330391).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255330391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607720 + ... + 608139.

It is an arithmetic number, because the mean of its divisors is an integer number (21885480).

Almost surely, 2^255330390 is an apocalyptic number.

255330390 is an abundant number, since it is smaller than the sum of its proper divisors (445004970).

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

255330390 is a wasteful number, since it uses less digits than its factorization.

255330390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215876.

The product of its (nonzero) digits is 12150, while the sum is 30.

The square root of 255330390 is about 15979.0609861781. The cubic root of 255330390 is about 634.4063230103.

The spelling of 255330390 in words is "two hundred fifty-five million, three hundred thirty thousand, three hundred ninety".