2278947 has 16 divisors (see below), whose sum is σ = 3379968. Its totient is φ = 1354080.

The previous prime is 2278943. The next prime is 2278949. The reversal of 2278947 is 7498722.

It is not a de Polignac number, because 2278947 - 2² = 2278943 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2278943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (211248).

2^2278947 is an apocalyptic number.

2278947 is a deficient number, since it is larger than the sum of its proper divisors (1101021).

2278947 is a wasteful number, since it uses less digits than its factorization.

2278947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its digits is 56448, while the sum is 39.

The square root of 2278947 is about 1509.6181636427. The cubic root of 2278947 is about 131.5966221113.

The spelling of 2278947 in words is "two million, two hundred seventy-eight thousand, nine hundred forty-seven".