26290890 has 48 divisors (see below), whose sum is σ = 68658408. Its totient is φ = 6979968.

The previous prime is 26290879. The next prime is 26290897. The reversal of 26290890 is 9809262.

It can be written as a sum of positive squares in 4 ways, for example, as 26286129 + 4761 = 5127^2 + 69^2 .

It is not an unprimeable number, because it can be changed into a prime (26290897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25872 + ... + 26868.

Almost surely, 2^26290890 is an apocalyptic number.

26290890 is an abundant number, since it is smaller than the sum of its proper divisors (42367518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26290890 is a wasteful number, since it uses less digits than its factorization.

26290890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 26290890 is about 5127.4642855899. The cubic root of 26290890 is about 297.3503331166.

The spelling of 26290890 in words is "twenty-six million, two hundred ninety thousand, eight hundred ninety".