428320684 has 24 divisors (see below), whose sum is σ = 821293200. Its totient is φ = 193836480.

The previous prime is 428320681. The next prime is 428320693. The reversal of 428320684 is 486023824.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (428320681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11179 + ... + 31330.

It is an arithmetic number, because the mean of its divisors is an integer number (34220550).

Almost surely, 2^428320684 is an apocalyptic number.

428320684 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

428320684 is a deficient number, since it is larger than the sum of its proper divisors (392972516).

428320684 is a wasteful number, since it uses less digits than its factorization.

428320684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42753 (or 42751 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 428320684 is about 20695.9098374534. The cubic root of 428320684 is about 753.8003749334.

The spelling of 428320684 in words is "four hundred twenty-eight million, three hundred twenty thousand, six hundred eighty-four".