8040781 has 8 divisors (see below), whose sum is σ = 9673280. Its totient is φ = 6529248.

The previous prime is 8040763. The next prime is 8040787. The reversal of 8040781 is 1870408.

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

It is a cyclic number.

It is not a de Polignac number, because 8040781 - 2⁷ = 8040653 is a prime.

It is a super-2 number, since 2×8040781² = 129308318179922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8040787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30096 + ... + 30361.

It is an arithmetic number, because the mean of its divisors is an integer number (1209160).

Almost surely, 2^8040781 is an apocalyptic number.

It is an amenable number.

8040781 is a deficient number, since it is larger than the sum of its proper divisors (1632499).

8040781 is a wasteful number, since it uses less digits than its factorization.

8040781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60483.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8040781 is about 2835.6270911387. The cubic root of 8040781 is about 200.3392658347.

The spelling of 8040781 in words is "eight million, forty thousand, seven hundred eighty-one".