2278428 has 24 divisors (see below), whose sum is σ = 5350800. Its totient is φ = 754560.

The previous prime is 2278421. The next prime is 2278429. The reversal of 2278428 is 8248722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278421) 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, 1648 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (222950).

2^2278428 is an apocalyptic number.

It is an amenable number.

2278428 is an abundant number, since it is smaller than the sum of its proper divisors (3072372).

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

2278428 is a wasteful number, since it uses less digits than its factorization.

2278428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1235 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 2278428 is about 1509.4462560820. The cubic root of 2278428 is about 131.5866315568.

The spelling of 2278428 in words is "two million, two hundred seventy-eight thousand, four hundred twenty-eight".