26247240 has 80 divisors (see below), whose sum is σ = 88230780. Its totient is φ = 6998400.

The previous prime is 26247229. The next prime is 26247251. The reversal of 26247240 is 4274262.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26247229) and next prime (26247251).

It can be written as a sum of positive squares in 2 ways, for example, as 23794884 + 2452356 = 4878^2 + 1566^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 811 + ... + 7290.

Almost surely, 2^26247240 is an apocalyptic number.

26247240 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 26247240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44115390).

26247240 is an abundant number, since it is smaller than the sum of its proper divisors (61983540).

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

26247240 is a wasteful number, since it uses less digits than its factorization.

26247240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124 (or 8111 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 26247240 is about 5123.2060274793. The cubic root of 26247240 is about 297.1856812575.

The spelling of 26247240 in words is "twenty-six million, two hundred forty-seven thousand, two hundred forty".