2263978 has 8 divisors (see below), whose sum is σ = 3404772. Its totient is φ = 1129056.

The previous prime is 2263969. The next prime is 2264027. The reversal of 2263978 is 8793622.

It can be written as a sum of positive squares in 2 ways, for example, as 2169729 + 94249 = 1473^2 + 307^2 .

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325 + ... + 2152.

2^2263978 is an apocalyptic number.

2263978 is a deficient number, since it is larger than the sum of its proper divisors (1140794).

2263978 is a wasteful number, since it uses less digits than its factorization.

2263978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its digits is 36288, while the sum is 37.

The square root of 2263978 is about 1504.6521192621. The cubic root of 2263978 is about 131.3078632242.

It can be divided in two parts, 22 and 63978, that added together give a cube (64000 = 40³).

The spelling of 2263978 in words is "two million, two hundred sixty-three thousand, nine hundred seventy-eight".