2788890 has 32 divisors (see below), whose sum is σ = 7209216. Its totient is φ = 686400.

The previous prime is 2788889. The next prime is 2788927. The reversal of 2788890 is 988872.

It is a happy 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, 3186 + ... + 3965.

It is an arithmetic number, because the mean of its divisors is an integer number (225288).

2^2788890 is an apocalyptic number.

2788890 is an abundant number, since it is smaller than the sum of its proper divisors (4420326).

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

2788890 is a wasteful number, since it uses less digits than its factorization.

2788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7174.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 2788890 is about 1669.9970059853. The cubic root of 2788890 is about 140.7593097058.

It can be divided in two parts, 27888 and 90, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 2788890 in words is "two million, seven hundred eighty-eight thousand, eight hundred ninety".