26191900 has 144 divisors (see below), whose sum is σ = 71995392. Its totient is φ = 8064000.

The previous prime is 26191877. The next prime is 26191903. The reversal of 26191900 is 919162.

It is a super-2 number, since 2×26191900² = 1372031251220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26191903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368865 + ... + 368935.

It is an arithmetic number, because the mean of its divisors is an integer number (499968).

Almost surely, 2^26191900 is an apocalyptic number.

26191900 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 26191900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35997696).

26191900 is an abundant number, since it is smaller than the sum of its proper divisors (45803492).

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

26191900 is a wasteful number, since it uses less digits than its factorization.

26191900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 26191900 is about 5117.8022626905. The cubic root of 26191900 is about 296.9766709939.

The spelling of 26191900 in words is "twenty-six million, one hundred ninety-one thousand, nine hundred".