40784689 has 4 divisors (see below), whose sum is σ = 44492400. Its totient is φ = 37076980.

The previous prime is 40784677. The next prime is 40784707. The reversal of 40784689 is 98648704.

It is a happy number.

40784689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40784689 - 2⁵ = 40784657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40784609) 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 3 ways as a sum of consecutive naturals, for example, 1853839 + ... + 1853860.

It is an arithmetic number, because the mean of its divisors is an integer number (11123100).

Almost surely, 2^40784689 is an apocalyptic number.

It is an amenable number.

40784689 is a deficient number, since it is larger than the sum of its proper divisors (3707711).

40784689 is a wasteful number, since it uses less digits than its factorization.

40784689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707710.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 40784689 is about 6386.2891415908. The cubic root of 40784689 is about 344.2170553034.

The spelling of 40784689 in words is "forty million, seven hundred eighty-four thousand, six hundred eighty-nine".