255790890 has 48 divisors (see below), whose sum is σ = 666900000. Its totient is φ = 68021856.

The previous prime is 255790807. The next prime is 255790897. The reversal of 255790890 is 98097552.

It is a happy number.

255790890 is a `hidden beast` number, since 2 + 557 + 9 + 0 + 8 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (255790897) 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 in 23 ways as a sum of consecutive naturals, for example, 30361 + ... + 37859.

It is an arithmetic number, because the mean of its divisors is an integer number (13893750).

Almost surely, 2^255790890 is an apocalyptic number.

255790890 is an abundant number, since it is smaller than the sum of its proper divisors (411109110).

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

255790890 is a wasteful number, since it uses less digits than its factorization.

255790890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891 (or 7888 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 255790890 is about 15993.4639775128. The cubic root of 255790890 is about 634.7874875292.

The spelling of 255790890 in words is "two hundred fifty-five million, seven hundred ninety thousand, eight hundred ninety".