26507780 has 48 divisors (see below), whose sum is σ = 61368384. Its totient is φ = 9555840.

The previous prime is 26507773. The next prime is 26507783. The reversal of 26507780 is 8770562.

It is a self number, because there is not a number n which added to its sum of digits gives 26507780.

It is not an unprimeable number, because it can be changed into a prime (26507783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9995 + ... + 12365.

It is an arithmetic number, because the mean of its divisors is an integer number (1278508).

Almost surely, 2^26507780 is an apocalyptic number.

26507780 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 26507780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30684192).

26507780 is an abundant number, since it is smaller than the sum of its proper divisors (34860604).

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

26507780 is a wasteful number, since it uses less digits than its factorization.

26507780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 26507780 is about 5148.5706754399. The cubic root of 26507780 is about 298.1657711674.

The spelling of 26507780 in words is "twenty-six million, five hundred seven thousand, seven hundred eighty".