2202778 has 4 divisors (see below), whose sum is σ = 3304170. Its totient is φ = 1101388.

The previous prime is 2202763. The next prime is 2202787. The reversal of 2202778 is 8772022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 840889 = 1167^2 + 917^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550693 + ... + 550696.

2^2202778 is an apocalyptic number.

2202778 is a deficient number, since it is larger than the sum of its proper divisors (1101392).

2202778 is a wasteful number, since it uses less digits than its factorization.

2202778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101391.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 2202778 is about 1484.1758655901. The cubic root of 2202778 is about 130.1138647358.

The spelling of 2202778 in words is "two million, two hundred two thousand, seven hundred seventy-eight".