255149440 has 192 divisors, whose sum is σ = 757092960. Its totient is φ = 80510976.

The previous prime is 255149399. The next prime is 255149449. The reversal of 255149440 is 44941552.

It is a junction number, because it is equal to n+sod(n) for n = 255149396 and 255149405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255149449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 756952 + ... + 757288.

Almost surely, 2^255149440 is an apocalyptic number.

255149440 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 255149440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378546480).

255149440 is an abundant number, since it is smaller than the sum of its proper divisors (501943520).

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

255149440 is a wasteful number, since it uses less digits than its factorization.

255149440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 255149440 is about 15973.3978852341. The cubic root of 255149440 is about 634.2564218658.

The spelling of 255149440 in words is "two hundred fifty-five million, one hundred forty-nine thousand, four hundred forty".