2278672 has 40 divisors (see below), whose sum is σ = 4901472. Its totient is φ = 1026080.

The previous prime is 2278649. The next prime is 2278681. The reversal of 2278672 is 2768722.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21243 + ... + 21349.

2^2278672 is an apocalyptic number.

2278672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2278672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2450736).

2278672 is an abundant number, since it is smaller than the sum of its proper divisors (2622800).

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

2278672 is a wasteful number, since it uses less digits than its factorization.

2278672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 120 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 2278672 is about 1509.5270782599. The cubic root of 2278672 is about 131.5913286539.

The spelling of 2278672 in words is "two million, two hundred seventy-eight thousand, six hundred seventy-two".