428220260 has 24 divisors (see below), whose sum is σ = 968437176. Its totient is φ = 158112000.

The previous prime is 428220253. The next prime is 428220319. The reversal of 428220260 is 62022824.

It can be written as a sum of positive squares in 4 ways, for example, as 2540836 + 425679424 = 1594^2 + 20632^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 823241 + ... + 823760.

It is an arithmetic number, because the mean of its divisors is an integer number (40351549).

Almost surely, 2^428220260 is an apocalyptic number.

It is an amenable number.

428220260 is an abundant number, since it is smaller than the sum of its proper divisors (540216916).

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

428220260 is a wasteful number, since it uses less digits than its factorization.

428220260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647023 (or 1647021 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 428220260 is about 20693.4835153485. The cubic root of 428220260 is about 753.7414583563.

It can be divided in two parts, 4282 and 20260, that added together give a palindrome (24542).

The spelling of 428220260 in words is "four hundred twenty-eight million, two hundred twenty thousand, two hundred sixty".