428790020 has 12 divisors (see below), whose sum is σ = 900459084. Its totient is φ = 171516000.

The previous prime is 428789987. The next prime is 428790029. The reversal of 428790020 is 20097824.

It can be written as a sum of positive squares in 2 ways, for example, as 339222724 + 89567296 = 18418^2 + 9464^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (428790029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10719731 + ... + 10719770.

It is an arithmetic number, because the mean of its divisors is an integer number (75038257).

Almost surely, 2^428790020 is an apocalyptic number.

It is an amenable number.

428790020 is an abundant number, since it is smaller than the sum of its proper divisors (471669064).

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

428790020 is a wasteful number, since it uses less digits than its factorization.

428790020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21439510 (or 21439508 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 428790020 is about 20707.2455918212. The cubic root of 428790020 is about 754.0756021353.

The spelling of 428790020 in words is "four hundred twenty-eight million, seven hundred ninety thousand, twenty".