2481778 has 16 divisors (see below), whose sum is σ = 4086936. Its totient is φ = 1123200.

The previous prime is 2481757. The next prime is 2481797. The reversal of 2481778 is 8771842.

It can be written as a sum of positive squares in 4 ways, for example, as 1495729 + 986049 = 1223^2 + 993^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478 + ... + 2278.

2^2481778 is an apocalyptic number.

2481778 is a deficient number, since it is larger than the sum of its proper divisors (1605158).

2481778 is a wasteful number, since it uses less digits than its factorization.

2481778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869.

The product of its digits is 25088, while the sum is 37.

The square root of 2481778 is about 1575.3659892228. The cubic root of 2481778 is about 135.3903289633.

Subtracting 2481778 from its reverse (8771842), we obtain a square (6290064 = 2508²).

The spelling of 2481778 in words is "two million, four hundred eighty-one thousand, seven hundred seventy-eight".