40820621 has 8 divisors (see below), whose sum is σ = 43868160. Its totient is φ = 37844928.

The previous prime is 40820617. The next prime is 40820623. The reversal of 40820621 is 12602804.

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 40820621 - 2² = 40820617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40820623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16781 + ... + 19058.

It is an arithmetic number, because the mean of its divisors is an integer number (5483520).

Almost surely, 2^40820621 is an apocalyptic number.

It is an amenable number.

40820621 is a deficient number, since it is larger than the sum of its proper divisors (3047539).

40820621 is a wasteful number, since it uses less digits than its factorization.

40820621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35923.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 40820621 is about 6389.1017365511. The cubic root of 40820621 is about 344.3181126450.

The spelling of 40820621 in words is "forty million, eight hundred twenty thousand, six hundred twenty-one".