2251878 has 16 divisors (see below), whose sum is σ = 4555440. Its totient is φ = 742016.

The previous prime is 2251877. The next prime is 2251891. The reversal of 2251878 is 8781522.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251877) 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, 1575 + ... + 2642.

It is an arithmetic number, because the mean of its divisors is an integer number (284715).

2^2251878 is an apocalyptic number.

2251878 is an abundant number, since it is smaller than the sum of its proper divisors (2303562).

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

2251878 is a wasteful number, since it uses less digits than its factorization.

2251878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311.

The product of its digits is 8960, while the sum is 33.

The square root of 2251878 is about 1500.6258694292. The cubic root of 2251878 is about 131.0735169966.

The spelling of 2251878 in words is "two million, two hundred fifty-one thousand, eight hundred seventy-eight".