41800781 has 6 divisors (see below), whose sum is σ = 45946446. Its totient is φ = 38000600.

The previous prime is 41800763. The next prime is 41800789. The reversal of 41800781 is 18700814.

It can be written as a sum of positive squares in only one way, i.e., 21855625 + 19945156 = 4675^2 + 4466^2 .

It is not a de Polignac number, because 41800781 - 2²² = 37606477 is a prime.

It is a super-2 number, since 2×41800781² = 3494610584419922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41800789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172610 + ... + 172851.

It is an arithmetic number, because the mean of its divisors is an integer number (7657741).

Almost surely, 2^41800781 is an apocalyptic number.

It is an amenable number.

41800781 is a deficient number, since it is larger than the sum of its proper divisors (4145665).

41800781 is a wasteful number, since it uses less digits than its factorization.

41800781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345483 (or 345472 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 41800781 is about 6465.3523492537. The cubic root of 41800781 is about 347.0521975477.

The spelling of 41800781 in words is "forty-one million, eight hundred thousand, seven hundred eighty-one".