40784561 has 8 divisors (see below), whose sum is σ = 42230784. Its totient is φ = 39346560.

The previous prime is 40784551. The next prime is 40784563. The reversal of 40784561 is 16548704.

40784561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40784561 - 2¹⁰ = 40783537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40784563) 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, 9080 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (5278848).

Almost surely, 2^40784561 is an apocalyptic number.

It is an amenable number.

40784561 is a deficient number, since it is larger than the sum of its proper divisors (1446223).

40784561 is a wasteful number, since it uses less digits than its factorization.

40784561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 40784561 is about 6386.2791201137. The cubic root of 40784561 is about 344.2166952024.

The spelling of 40784561 in words is "forty million, seven hundred eighty-four thousand, five hundred sixty-one".