2206278 has 20 divisors (see below), whose sum is σ = 4944060. Its totient is φ = 735372.

The previous prime is 2206249. The next prime is 2206283. The reversal of 2206278 is 8726022.

It is a super-2 number, since 2×2206278² = 9735325226568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6648 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (247203).

2^2206278 is an apocalyptic number.

2206278 is an abundant number, since it is smaller than the sum of its proper divisors (2737782).

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

2206278 is a wasteful number, since it uses less digits than its factorization.

2206278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13633 (or 13624 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2206278 is about 1485.3545031406. The cubic root of 2206278 is about 130.1827410281.

The spelling of 2206278 in words is "two million, two hundred six thousand, two hundred seventy-eight".