2820428 has 24 divisors (see below), whose sum is σ = 5395488. Its totient is φ = 1282176.

The previous prime is 2820407. The next prime is 2820479. The reversal of 2820428 is 8240282.

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

It is a junction number, because it is equal to n+sod(n) for n = 2820397 and 2820406.

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, 3425 + ... + 4167.

It is an arithmetic number, because the mean of its divisors is an integer number (224812).

2^2820428 is an apocalyptic number.

It is an amenable number.

2820428 is a deficient number, since it is larger than the sum of its proper divisors (2575060).

2820428 is a wasteful number, since it uses less digits than its factorization.

2820428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 2820428 is about 1679.4129926852. The cubic root of 2820428 is about 141.2879116133.

The spelling of 2820428 in words is "two million, eight hundred twenty thousand, four hundred twenty-eight".