255299040 has 120 divisors (see below), whose sum is σ = 901038600. Its totient is φ = 68076288.

The previous prime is 255299017. The next prime is 255299059. The reversal of 255299040 is 40992552.

It is a happy number.

255299040 is a `hidden beast` number, since 2 + 5 + 529 + 90 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 255298986 and 255299004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3111 + ... + 22809.

It is an arithmetic number, because the mean of its divisors is an integer number (7508655).

Almost surely, 2^255299040 is an apocalyptic number.

255299040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255299040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450519300).

255299040 is an abundant number, since it is smaller than the sum of its proper divisors (645739560).

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

255299040 is a wasteful number, since it uses less digits than its factorization.

255299040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19726 (or 19709 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 255299040 is about 15978.0799847791. The cubic root of 255299040 is about 634.3803573686.

The spelling of 255299040 in words is "two hundred fifty-five million, two hundred ninety-nine thousand, forty".