26500890 has 48 divisors (see below), whose sum is σ = 68884128. Its totient is φ = 6522048.

The previous prime is 26500889. The next prime is 26500913. The reversal of 26500890 is 9800562.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 23 ways as a sum of consecutive naturals, for example, 2457 + ... + 7683.

It is an arithmetic number, because the mean of its divisors is an integer number (1435086).

Almost surely, 2^26500890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26500890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34442064).

26500890 is an abundant number, since it is smaller than the sum of its proper divisors (42383238).

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

26500890 is a wasteful number, since it uses less digits than its factorization.

26500890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263 (or 5250 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 26500890 is about 5147.9015142095. The cubic root of 26500890 is about 298.1399354797.

The spelling of 26500890 in words is "twenty-six million, five hundred thousand, eight hundred ninety".