2878428 has 24 divisors (see below), whose sum is σ = 7676032. Its totient is φ = 822384.

The previous prime is 2878409. The next prime is 2878429. The reversal of 2878428 is 8248782.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878429) 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, 17050 + ... + 17217.

2^2878428 is an apocalyptic number.

2878428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2878428 is an abundant number, since it is smaller than the sum of its proper divisors (4797604).

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

2878428 is a wasteful number, since it uses less digits than its factorization.

2878428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34281 (or 34279 counting only the distinct ones).

The product of its digits is 57344, while the sum is 39.

The square root of 2878428 is about 1696.5930566874. The cubic root of 2878428 is about 142.2498411893.

The spelling of 2878428 in words is "two million, eight hundred seventy-eight thousand, four hundred twenty-eight".