26865620 has 54 divisors (see below), whose sum is σ = 60535566. Its totient is φ = 10013760.

The previous prime is 26865617. The next prime is 26865653. The reversal of 26865620 is 2656862.

It can be written as a sum of positive squares in 3 ways, for example, as 2085136 + 24780484 = 1444^2 + 4978^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 440390 + ... + 440450.

It is an arithmetic number, because the mean of its divisors is an integer number (1121029).

Almost surely, 2^26865620 is an apocalyptic number.

26865620 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 26865620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30267783).

26865620 is an abundant number, since it is smaller than the sum of its proper divisors (33669946).

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

26865620 is a wasteful number, since it uses less digits than its factorization.

26865620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 26865620 is about 5183.2055718445. The cubic root of 26865620 is about 299.5014683090.

The spelling of 26865620 in words is "twenty-six million, eight hundred sixty-five thousand, six hundred twenty".