428958621 has 24 divisors (see below), whose sum is σ = 762594560. Its totient is φ = 226263456.

The previous prime is 428958617. The next prime is 428958623. The reversal of 428958621 is 126859824.

428958621 is a `hidden beast` number, since 42 + 8 + 9 + 586 + 21 = 666.

It is not a de Polignac number, because 428958621 - 2² = 428958617 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428958623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261061 + ... + 262698.

Almost surely, 2^428958621 is an apocalyptic number.

It is an amenable number.

428958621 is a deficient number, since it is larger than the sum of its proper divisors (333635939).

428958621 is a wasteful number, since it uses less digits than its factorization.

428958621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523785 (or 523782 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 428958621 is about 20711.3162546469. The cubic root of 428958621 is about 754.1744238077.

The spelling of 428958621 in words is "four hundred twenty-eight million, nine hundred fifty-eight thousand, six hundred twenty-one".