2878890 has 32 divisors (see below), whose sum is σ = 7896960. Its totient is φ = 657984.

The previous prime is 2878879. The next prime is 2878903. The reversal of 2878890 is 988782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam 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, 6645 + ... + 7064.

It is an arithmetic number, because the mean of its divisors is an integer number (246780).

2^2878890 is an apocalyptic number.

2878890 is an abundant number, since it is smaller than the sum of its proper divisors (5018070).

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

2878890 is a wasteful number, since it uses less digits than its factorization.

2878890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13726.

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

The square root of 2878890 is about 1696.7292064440. The cubic root of 2878890 is about 142.2574513513.

Subtracting from 2878890 its product of nonzero digits (64512), we obtain a triangular number (2814378 = T₂₃₇₂).

The spelling of 2878890 in words is "two million, eight hundred seventy-eight thousand, eight hundred ninety".