2278722 has 8 divisors (see below), whose sum is σ = 4557456. Its totient is φ = 759572.

The previous prime is 2278709. The next prime is 2278729.

2278722 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

2278722 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2278722.

It is not an unprimeable number, because it can be changed into a prime (2278729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189888 + ... + 189899.

It is an arithmetic number, because the mean of its divisors is an integer number (569682).

2^2278722 is an apocalyptic number.

2278722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2278722 is a wasteful number, since it uses less digits than its factorization.

2278722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379792.

The product of its digits is 6272, while the sum is 30.

The square root of 2278722 is about 1509.5436396474. The cubic root of 2278722 is about 131.5922911323.

The spelling of 2278722 in words is "two million, two hundred seventy-eight thousand, seven hundred twenty-two".