40780869 has 4 divisors (see below), whose sum is σ = 54374496. Its totient is φ = 27187244.

The previous prime is 40780867. The next prime is 40780877. The reversal of 40780869 is 96808704.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40780869 - 2¹ = 40780867 is a prime.

It is a super-2 number, since 2×40780869² = 3326158552790322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40780869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40780867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6796809 + ... + 6796814.

It is an arithmetic number, because the mean of its divisors is an integer number (13593624).

Almost surely, 2^40780869 is an apocalyptic number.

It is an amenable number.

40780869 is a deficient number, since it is larger than the sum of its proper divisors (13593627).

40780869 is a wasteful number, since it uses less digits than its factorization.

40780869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13593626.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 40780869 is about 6385.9900563656. The cubic root of 40780869 is about 344.2063082131.

The spelling of 40780869 in words is "forty million, seven hundred eighty thousand, eight hundred sixty-nine".