26421090 has 16 divisors (see below), whose sum is σ = 63410688. Its totient is φ = 7045616.

The previous prime is 26421067. The next prime is 26421107. The reversal of 26421090 is 9012462.

It is a self number, because there is not a number n which added to its sum of digits gives 26421090.

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, 440322 + ... + 440381.

It is an arithmetic number, because the mean of its divisors is an integer number (3963168).

Almost surely, 2^26421090 is an apocalyptic number.

26421090 is an abundant number, since it is smaller than the sum of its proper divisors (36989598).

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

26421090 is a wasteful number, since it uses less digits than its factorization.

26421090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880713.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 26421090 is about 5140.1449395907. The cubic root of 26421090 is about 297.8403796606.

The spelling of 26421090 in words is "twenty-six million, four hundred twenty-one thousand, ninety".