26705820 has 24 divisors (see below), whose sum is σ = 74776464. Its totient is φ = 7121536.

The previous prime is 26705807. The next prime is 26705843. The reversal of 26705820 is 2850762.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222489 + ... + 222608.

It is an arithmetic number, because the mean of its divisors is an integer number (3115686).

Almost surely, 2^26705820 is an apocalyptic number.

26705820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26705820 is an abundant number, since it is smaller than the sum of its proper divisors (48070644).

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

26705820 is a wasteful number, since it uses less digits than its factorization.

26705820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445109 (or 445107 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 26705820 is about 5167.7674096267. The cubic root of 26705820 is about 298.9064632120.

The spelling of 26705820 in words is "twenty-six million, seven hundred five thousand, eight hundred twenty".