428722461 has 12 divisors (see below), whose sum is σ = 646190688. Its totient is φ = 273388104.

The previous prime is 428722453. The next prime is 428722499. The reversal of 428722461 is 164227824.

428722461 is a `hidden beast` number, since 428 + 7 + 224 + 6 + 1 = 666.

It is not a de Polignac number, because 428722461 - 2³ = 428722453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428722421) 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, 1035355 + ... + 1035768.

It is an arithmetic number, because the mean of its divisors is an integer number (53849224).

Almost surely, 2^428722461 is an apocalyptic number.

It is an amenable number.

428722461 is a deficient number, since it is larger than the sum of its proper divisors (217468227).

428722461 is a wasteful number, since it uses less digits than its factorization.

428722461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071152 (or 2071149 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 428722461 is about 20705.6142386552. The cubic root of 428722461 is about 754.0359966820.

The spelling of 428722461 in words is "four hundred twenty-eight million, seven hundred twenty-two thousand, four hundred sixty-one".