26216520 has 64 divisors (see below), whose sum is σ = 85803840. Its totient is φ = 6355200.

The previous prime is 26216513. The next prime is 26216521. The reversal of 26216520 is 2561262.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (26216521) 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, 8611 + ... + 11250.

It is an arithmetic number, because the mean of its divisors is an integer number (1340685).

Almost surely, 2^26216520 is an apocalyptic number.

26216520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26216520 is an abundant number, since it is smaller than the sum of its proper divisors (59587320).

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

26216520 is a wasteful number, since it uses less digits than its factorization.

26216520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19886 (or 19882 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 26216520 is about 5120.2070270644. The cubic root of 26216520 is about 297.0696930848.

Adding to 26216520 its reverse (2561262), we get a palindrome (28777782).

The spelling of 26216520 in words is "twenty-six million, two hundred sixteen thousand, five hundred twenty".