2808156 has 48 divisors (see below), whose sum is σ = 7225344. Its totient is φ = 843456.

The previous prime is 2808149. The next prime is 2808161. The reversal of 2808156 is 6518082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7141 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (150528).

2^2808156 is an apocalyptic number.

2808156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2808156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3612672).

2808156 is an abundant number, since it is smaller than the sum of its proper divisors (4417188).

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

2808156 is a wasteful number, since it uses less digits than its factorization.

2808156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 2808156 is about 1675.7553520726. The cubic root of 2808156 is about 141.0826938090.

The spelling of 2808156 in words is "two million, eight hundred eight thousand, one hundred fifty-six".