255499440 has 80 divisors (see below), whose sum is σ = 905203968. Its totient is φ = 58399488.

The previous prime is 255499429. The next prime is 255499457. The reversal of 255499440 is 44994552.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 255499392 and 255499401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74362 + ... + 77721.

Almost surely, 2^255499440 is an apocalyptic number.

255499440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255499440 is an abundant number, since it is smaller than the sum of its proper divisors (649704528).

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

255499440 is a wasteful number, since it uses less digits than its factorization.

255499440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152106 (or 152100 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 255499440 is about 15984.3498460213. The cubic root of 255499440 is about 634.5463020768.

The spelling of 255499440 in words is "two hundred fifty-five million, four hundred ninety-nine thousand, four hundred forty".