255616740 has 36 divisors (see below), whose sum is σ = 775371324. Its totient is φ = 68164416.

The previous prime is 255616729. The next prime is 255616741. The reversal of 255616740 is 47616552.

It is a happy number.

255616740 is a `hidden beast` number, since 2 + 556 + 1 + 67 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 227165184 = 5334^2 + 15072^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 255616695 and 255616704.

It is not an unprimeable number, because it can be changed into a prime (255616741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 709867 + ... + 710226.

Almost surely, 2^255616740 is an apocalyptic number.

255616740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255616740 is an abundant number, since it is smaller than the sum of its proper divisors (519754584).

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

255616740 is a wasteful number, since it uses less digits than its factorization.

255616740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420108 (or 1420103 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 255616740 is about 15988.0186389684. The cubic root of 255616740 is about 634.6433941272.

The spelling of 255616740 in words is "two hundred fifty-five million, six hundred sixteen thousand, seven hundred forty".