26889840 has 160 divisors (see below), whose sum is σ = 94636800. Its totient is φ = 7015680.

The previous prime is 26889827. The next prime is 26889853. The reversal of 26889840 is 4898862.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26889827) and next prime (26889853).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127335 + ... + 127545.

It is an arithmetic number, because the mean of its divisors is an integer number (591480).

Almost surely, 2^26889840 is an apocalyptic number.

26889840 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 26889840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47318400).

26889840 is an abundant number, since it is smaller than the sum of its proper divisors (67746960).

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

26889840 is a wasteful number, since it uses less digits than its factorization.

26889840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 26889840 is about 5185.5414374971. The cubic root of 26889840 is about 299.5914438588.

The spelling of 26889840 in words is "twenty-six million, eight hundred eighty-nine thousand, eight hundred forty".