255156440 has 128 divisors (see below), whose sum is σ = 735436800. Its totient is φ = 77345280.

The previous prime is 255156439. The next prime is 255156449. The reversal of 255156440 is 44651552.

255156440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 255156397 and 255156406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255156449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112841 + ... + 115079.

It is an arithmetic number, because the mean of its divisors is an integer number (5745600).

Almost surely, 2^255156440 is an apocalyptic number.

255156440 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 255156440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367718400).

255156440 is an abundant number, since it is smaller than the sum of its proper divisors (480280360).

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

255156440 is a wasteful number, since it uses less digits than its factorization.

255156440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2301 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 255156440 is about 15973.6169980377. The cubic root of 255156440 is about 634.2622220671.

The spelling of 255156440 in words is "two hundred fifty-five million, one hundred fifty-six thousand, four hundred forty".