2808428 has 24 divisors (see below), whose sum is σ = 5913600. Its totient is φ = 1140048.

The previous prime is 2808427. The next prime is 2808433. The reversal of 2808428 is 8248082.

It is a junction number, because it is equal to n+sod(n) for n = 2808394 and 2808403.

It is not an unprimeable number, because it can be changed into a prime (2808427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (246400).

2^2808428 is an apocalyptic number.

2808428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2808428 is an abundant number, since it is smaller than the sum of its proper divisors (3105172).

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

2808428 is a wasteful number, since it uses less digits than its factorization.

2808428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5309 (or 5307 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 2808428 is about 1675.8365075388. The cubic root of 2808428 is about 141.0872487855.

The spelling of 2808428 in words is "two million, eight hundred eight thousand, four hundred twenty-eight".