26305290 has 128 divisors (see below), whose sum is σ = 81181440. Its totient is φ = 5990400.

The previous prime is 26305283. The next prime is 26305309. The reversal of 26305290 is 9250362.

26305290 is a `hidden beast` number, since 2 + 630 + 5 + 29 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50230 + ... + 50750.

It is an arithmetic number, because the mean of its divisors is an integer number (634230).

Almost surely, 2^26305290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26305290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40590720).

26305290 is an abundant number, since it is smaller than the sum of its proper divisors (54876150).

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

26305290 is a wasteful number, since it uses less digits than its factorization.

26305290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 26305290 is about 5128.8682962229. The cubic root of 26305290 is about 297.4046112751.

The spelling of 26305290 in words is "twenty-six million, three hundred five thousand, two hundred ninety".