2291278 has 8 divisors (see below), whose sum is σ = 3749400. Its totient is φ = 1041480.

The previous prime is 2291273. The next prime is 2291281. The reversal of 2291278 is 8721922.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291273) 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, 52053 + ... + 52096.

It is an arithmetic number, because the mean of its divisors is an integer number (468675).

2^2291278 is an apocalyptic number.

2291278 is a deficient number, since it is larger than the sum of its proper divisors (1458122).

2291278 is a wasteful number, since it uses less digits than its factorization.

2291278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104162.

The product of its digits is 4032, while the sum is 31.

The square root of 2291278 is about 1513.6967992303. The cubic root of 2291278 is about 131.8335443919.

The spelling of 2291278 in words is "two million, two hundred ninety-one thousand, two hundred seventy-eight".