2269978 has 4 divisors (see below), whose sum is σ = 3404970. Its totient is φ = 1134988.

The previous prime is 2269973. The next prime is 2269991. The reversal of 2269978 is 8799622.

It is a happy number.

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., 1399489 + 870489 = 1183^2 + 933^2 .

It is not an unprimeable number, because it can be changed into a prime (2269973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567493 + ... + 567496.

2^2269978 is an apocalyptic number.

2269978 is a deficient number, since it is larger than the sum of its proper divisors (1134992).

2269978 is a wasteful number, since it uses less digits than its factorization.

2269978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134991.

The product of its digits is 108864, while the sum is 43.

The square root of 2269978 is about 1506.6446163578. The cubic root of 2269978 is about 131.4237583754.

The spelling of 2269978 in words is "two million, two hundred sixty-nine thousand, nine hundred seventy-eight".