428121984 has 64 divisors (see below), whose sum is σ = 1197072000. Its totient is φ = 135194112.

The previous prime is 428121979. The next prime is 428122031. The reversal of 428121984 is 489121824.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22044 + ... + 36635.

It is an arithmetic number, because the mean of its divisors is an integer number (18704250).

Almost surely, 2^428121984 is an apocalyptic number.

It is an amenable number.

428121984 is an abundant number, since it is smaller than the sum of its proper divisors (768950016).

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

428121984 is a wasteful number, since it uses less digits than its factorization.

428121984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58715 (or 58703 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 428121984 is about 20691.1088151409. The cubic root of 428121984 is about 753.6837930456.

The spelling of 428121984 in words is "four hundred twenty-eight million, one hundred twenty-one thousand, nine hundred eighty-four".