26380780 has 24 divisors (see below), whose sum is σ = 55828080. Its totient is φ = 10470720.

The previous prime is 26380777. The next prime is 26380789. The reversal of 26380780 is 8708362.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26380789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415 + ... + 7654.

It is an arithmetic number, because the mean of its divisors is an integer number (2326170).

Almost surely, 2^26380780 is an apocalyptic number.

26380780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26380780 is an abundant number, since it is smaller than the sum of its proper divisors (29447300).

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

26380780 is a wasteful number, since it uses less digits than its factorization.

26380780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209 (or 10207 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 26380780 is about 5136.2223472120. Note that the first 3 decimals coincide. The cubic root of 26380780 is about 297.6888333441.

The spelling of 26380780 in words is "twenty-six million, three hundred eighty thousand, seven hundred eighty".