26863490 has 16 divisors (see below), whose sum is σ = 48784248. Its totient is φ = 10649856.

The previous prime is 26863481. The next prime is 26863513. The reversal of 26863490 is 9436862.

It is a Cunningham number, because it is equal to 5183²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 9665881 + 17197609 = 3109^2 + 4147^2 .

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, 10757 + ... + 13016.

Almost surely, 2^26863490 is an apocalyptic number.

26863490 is a deficient number, since it is larger than the sum of its proper divisors (21920758).

26863490 is a wasteful number, since it uses less digits than its factorization.

26863490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23893.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 26863490 is about 5183.0000964692. Note that the first 4 decimals coincide. The cubic root of 26863490 is about 299.4935529264.

The spelling of 26863490 in words is "twenty-six million, eight hundred sixty-three thousand, four hundred ninety".