26621900 has 36 divisors (see below), whose sum is σ = 58871232. Its totient is φ = 10445760.

The previous prime is 26621899. The next prime is 26621909. The reversal of 26621900 is 912662.

It is a super-2 number, since 2×26621900² = 1417451119220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26621900.

It is not an unprimeable number, because it can be changed into a prime (26621909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2789 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (1635312).

Almost surely, 2^26621900 is an apocalyptic number.

26621900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26621900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29435616).

26621900 is an abundant number, since it is smaller than the sum of its proper divisors (32249332).

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

26621900 is a wasteful number, since it uses less digits than its factorization.

26621900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090 (or 5083 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 26621900 is about 5159.6414604118. The cubic root of 26621900 is about 298.5930415042.

The spelling of 26621900 in words is "twenty-six million, six hundred twenty-one thousand, nine hundred".