426981728 has 24 divisors (see below), whose sum is σ = 851266080. Its totient is φ = 210787200.

The previous prime is 426981719. The next prime is 426981757. The reversal of 426981728 is 827189624.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81923 + ... + 86978.

It is an arithmetic number, because the mean of its divisors is an integer number (35469420).

Almost surely, 2^426981728 is an apocalyptic number.

It is an amenable number.

426981728 is a deficient number, since it is larger than the sum of its proper divisors (424284352).

426981728 is a wasteful number, since it uses less digits than its factorization.

426981728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168990 (or 168982 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 426981728 is about 20663.5361930140. The cubic root of 426981728 is about 753.0140800541.

The spelling of 426981728 in words is "four hundred twenty-six million, nine hundred eighty-one thousand, seven hundred twenty-eight".