2449978 has 16 divisors (see below), whose sum is σ = 3878280. Its totient is φ = 1158976.

The previous prime is 2449963. The next prime is 2449987. The reversal of 2449978 is 8799442.

It can be written as a sum of positive squares in 4 ways, for example, as 2271049 + 178929 = 1507^2 + 423^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2676 + ... + 3472.

2^2449978 is an apocalyptic number.

2449978 is a deficient number, since it is larger than the sum of its proper divisors (1428302).

2449978 is a wasteful number, since it uses less digits than its factorization.

2449978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its digits is 145152, while the sum is 43.

The square root of 2449978 is about 1565.2405565919. The cubic root of 2449978 is about 134.8095714747.

The spelling of 2449978 in words is "two million, four hundred forty-nine thousand, nine hundred seventy-eight".