40851785 has 16 divisors (see below), whose sum is σ = 54084240. Its totient is φ = 29429760.

The previous prime is 40851781. The next prime is 40851787. The reversal of 40851785 is 58715804.

It can be written as a sum of positive squares in 8 ways, for example, as 20457529 + 20394256 = 4523^2 + 4516^2 .

It is not a de Polignac number, because 40851785 - 2² = 40851781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40851781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5000 + ... + 10329.

It is an arithmetic number, because the mean of its divisors is an integer number (3380265).

Almost surely, 2^40851785 is an apocalyptic number.

It is an amenable number.

40851785 is a deficient number, since it is larger than the sum of its proper divisors (13232455).

40851785 is a wasteful number, since it uses less digits than its factorization.

40851785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 40851785 is about 6391.5401117415. The cubic root of 40851785 is about 344.4057121631.

The spelling of 40851785 in words is "forty million, eight hundred fifty-one thousand, seven hundred eighty-five".