26490780 has 48 divisors (see below), whose sum is σ = 82417440. Its totient is φ = 7064064.

The previous prime is 26490773. The next prime is 26490809. The reversal of 26490780 is 8709462.

26490780 is a `hidden beast` number, since 2 + 649 + 0 + 7 + 8 + 0 = 666.

It is a super-2 number, since 2×26490780² = 1403522850016800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23989 + ... + 25068.

It is an arithmetic number, because the mean of its divisors is an integer number (1717030).

Almost surely, 2^26490780 is an apocalyptic number.

26490780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26490780 is an abundant number, since it is smaller than the sum of its proper divisors (55926660).

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

26490780 is a wasteful number, since it uses less digits than its factorization.

26490780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49075 (or 49067 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 26490780 is about 5146.9194670210. The cubic root of 26490780 is about 298.1020175314.

The spelling of 26490780 in words is "twenty-six million, four hundred ninety thousand, seven hundred eighty".