40724785 has 4 divisors (see below), whose sum is σ = 48869748. Its totient is φ = 32579824.

The previous prime is 40724777. The next prime is 40724833. The reversal of 40724785 is 58742704.

40724785 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.

It can be written as a sum of positive squares in 2 ways, for example, as 24532209 + 16192576 = 4953^2 + 4024^2 .

It is a cyclic number.

It is not a de Polignac number, because 40724785 - 2³ = 40724777 is a prime.

It is a super-2 number, since 2×40724785² = 3317016226592450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 4072474 + ... + 4072483.

It is an arithmetic number, because the mean of its divisors is an integer number (12217437).

Almost surely, 2^40724785 is an apocalyptic number.

It is an amenable number.

40724785 is a deficient number, since it is larger than the sum of its proper divisors (8144963).

40724785 is an equidigital number, since it uses as much as digits as its factorization.

40724785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144962.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 40724785 is about 6381.5973705648. The cubic root of 40724785 is about 344.0484456063.

The spelling of 40724785 in words is "forty million, seven hundred twenty-four thousand, seven hundred eighty-five".