26420781 has 8 divisors (see below), whose sum is σ = 35258080. Its totient is φ = 17598672.

The previous prime is 26420759. The next prime is 26420803. The reversal of 26420781 is 18702462.

It is an interprime number because it is at equal distance from previous prime (26420759) and next prime (26420803).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26420781 - 2⁵ = 26420749 is a prime.

It is a super-2 number, since 2×26420781² = 1396115337299922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26420281) 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, 1206 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (4407260).

Almost surely, 2^26420781 is an apocalyptic number.

It is an amenable number.

26420781 is a deficient number, since it is larger than the sum of its proper divisors (8837299).

26420781 is a wasteful number, since it uses less digits than its factorization.

26420781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7595.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 26420781 is about 5140.1148819846. The cubic root of 26420781 is about 297.8392185549.

The spelling of 26420781 in words is "twenty-six million, four hundred twenty thousand, seven hundred eighty-one".