428712987720 has 128 divisors (see below), whose sum is σ = 1303159104000. Its totient is φ = 112812211200.

The previous prime is 428712987719. The next prime is 428712987739. The reversal of 428712987720 is 27789217824.

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, 18009586 + ... + 18033374.

It is an arithmetic number, because the mean of its divisors is an integer number (10180930500).

Almost surely, 2^428712987720 is an apocalyptic number.

428712987720 is a gapful number since it is divisible by the number (40) 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 428712987720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651579552000).

428712987720 is an abundant number, since it is smaller than the sum of its proper divisors (874446116280).

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

428712987720 is a wasteful number, since it uses less digits than its factorization.

428712987720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25783 (or 25779 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 57.

The spelling of 428712987720 in words is "four hundred twenty-eight billion, seven hundred twelve million, nine hundred eighty-seven thousand, seven hundred twenty".