40821716 has 12 divisors (see below), whose sum is σ = 76933332. Its totient is φ = 18840768.

The previous prime is 40821707. The next prime is 40821779. The reversal of 40821716 is 61712804.

It can be written as a sum of positive squares in 2 ways, for example, as 21196816 + 19624900 = 4604^2 + 4430^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392465 + ... + 392568.

It is an arithmetic number, because the mean of its divisors is an integer number (6411111).

Almost surely, 2^40821716 is an apocalyptic number.

It is an amenable number.

40821716 is a deficient number, since it is larger than the sum of its proper divisors (36111616).

40821716 is a wasteful number, since it uses less digits than its factorization.

40821716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785050 (or 785048 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 40821716 is about 6389.1874287737. The cubic root of 40821716 is about 344.3211913583.

The spelling of 40821716 in words is "forty million, eight hundred twenty-one thousand, seven hundred sixteen".