26490520 has 64 divisors (see below), whose sum is σ = 69986880. Its totient is φ = 8833536.

The previous prime is 26490509. The next prime is 26490533. The reversal of 26490520 is 2509462.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9082 + ... + 11638.

It is an arithmetic number, because the mean of its divisors is an integer number (1093545).

Almost surely, 2^26490520 is an apocalyptic number.

26490520 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 26490520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34993440).

26490520 is an abundant number, since it is smaller than the sum of its proper divisors (43496360).

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

26490520 is a wasteful number, since it uses less digits than its factorization.

26490520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 26490520 is about 5146.8942091323. The cubic root of 26490520 is about 298.1010422640.

Adding to 26490520 its reverse (2509462), we get a palindrome (28999982).

The spelling of 26490520 in words is "twenty-six million, four hundred ninety thousand, five hundred twenty".