428521306744 has 8 divisors (see below), whose sum is σ = 803477450160. Its totient is φ = 214260653368.

The previous prime is 428521306709. The next prime is 428521306757. The reversal of 428521306744 is 447603125824.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 428521306694 and 428521306703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26782581664 + ... + 26782581679.

It is an arithmetic number, because the mean of its divisors is an integer number (100434681270).

Almost surely, 2^428521306744 is an apocalyptic number.

It is an amenable number.

428521306744 is a deficient number, since it is larger than the sum of its proper divisors (374956143416).

428521306744 is a wasteful number, since it uses less digits than its factorization.

428521306744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53565163349 (or 53565163345 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 428521306744 in words is "four hundred twenty-eight billion, five hundred twenty-one million, three hundred six thousand, seven hundred forty-four".