428961628 has 12 divisors (see below), whose sum is σ = 757971760. Its totient is φ = 212398272.

The previous prime is 428961619. The next prime is 428961641. The reversal of 428961628 is 826169824.

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, 520173 + ... + 520996.

Almost surely, 2^428961628 is an apocalyptic number.

It is an amenable number.

428961628 is a deficient number, since it is larger than the sum of its proper divisors (329010132).

428961628 is a wasteful number, since it uses less digits than its factorization.

428961628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041276 (or 1041274 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 428961628 is about 20711.3888476847. The cubic root of 428961628 is about 754.1761860579.

The spelling of 428961628 in words is "four hundred twenty-eight million, nine hundred sixty-one thousand, six hundred twenty-eight".