427721256 has 32 divisors (see below), whose sum is σ = 1188115200. Its totient is φ = 142573680.

The previous prime is 427721249. The next prime is 427721263. The reversal of 427721256 is 652127724.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (427721249) and next prime (427721263).

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

It is a self number, because there is not a number n which added to its sum of digits gives 427721256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989880 + ... + 990311.

It is an arithmetic number, because the mean of its divisors is an integer number (37128600).

Almost surely, 2^427721256 is an apocalyptic number.

It is an amenable number.

427721256 is an abundant number, since it is smaller than the sum of its proper divisors (760393944).

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

427721256 is a wasteful number, since it uses less digits than its factorization.

427721256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980206 (or 1980196 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 427721256 is about 20681.4229684517. The cubic root of 427721256 is about 753.4485668783.

The spelling of 427721256 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, two hundred fifty-six".