428332723764 has 96 divisors (see below), whose sum is σ = 1117216558080. Its totient is φ = 126595449600.

The previous prime is 428332723759. The next prime is 428332723787. The reversal of 428332723764 is 467327233824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23040417 + ... + 23058999.

It is an arithmetic number, because the mean of its divisors is an integer number (11637672480).

Almost surely, 2^428332723764 is an apocalyptic number.

428332723764 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428332723764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558608279040).

428332723764 is an abundant number, since it is smaller than the sum of its proper divisors (688883834316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428332723764 is a wasteful number, since it uses less digits than its factorization.

428332723764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22901 (or 22899 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 51.

The spelling of 428332723764 in words is "four hundred twenty-eight billion, three hundred thirty-two million, seven hundred twenty-three thousand, seven hundred sixty-four".