2278881 has 16 divisors (see below), whose sum is σ = 3683520. Its totient is φ = 1380960.

The previous prime is 2278877. The next prime is 2278891. The reversal of 2278881 is 1888722.

It is not a de Polignac number, because 2278881 - 2² = 2278877 is a prime.

It is a super-2 number, since 2×2278881² = 10386597224322, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2278811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3540 + ... + 4133.

It is an arithmetic number, because the mean of its divisors is an integer number (230220).

2^2278881 is an apocalyptic number.

It is an amenable number.

2278881 is a deficient number, since it is larger than the sum of its proper divisors (1404639).

2278881 is a wasteful number, since it uses less digits than its factorization.

2278881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693 (or 7687 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2278881 is about 1509.5963036521. The cubic root of 2278881 is about 131.5953517203.

The spelling of 2278881 in words is "two million, two hundred seventy-eight thousand, eight hundred eighty-one".