428285788 has 18 divisors (see below), whose sum is σ = 856790648. Its totient is φ = 183504120.

The previous prime is 428285747. The next prime is 428285831. The reversal of 428285788 is 887582824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107553 + ... + 111463.

Almost surely, 2^428285788 is an apocalyptic number.

It is an amenable number.

428285788 is an abundant number, since it is smaller than the sum of its proper divisors (428504860).

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

428285788 is an frugal number, since it uses more digits than its factorization.

428285788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7833 (or 3920 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 52.

The square root of 428285788 is about 20695.0667551472. The cubic root of 428285788 is about 753.7799032531.

The spelling of 428285788 in words is "four hundred twenty-eight million, two hundred eighty-five thousand, seven hundred eighty-eight".