26921090 has 24 divisors (see below), whose sum is σ = 56370492. Its totient is φ = 9229920.

The previous prime is 26921087. The next prime is 26921101. The reversal of 26921090 is 9012962.

It can be written as a sum of positive squares in 2 ways, for example, as 26615281 + 305809 = 5159^2 + 553^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26981 + ... + 27960.

Almost surely, 2^26921090 is an apocalyptic number.

26921090 is an abundant number, since it is smaller than the sum of its proper divisors (29449402).

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

26921090 is a wasteful number, since it uses less digits than its factorization.

26921090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54962 (or 54955 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 26921090 is about 5188.5537483966. The cubic root of 26921090 is about 299.7074555593.

The spelling of 26921090 in words is "twenty-six million, nine hundred twenty-one thousand, ninety".