40733821 has 4 divisors (see below), whose sum is σ = 40763200. Its totient is φ = 40704444.

The previous prime is 40733813. The next prime is 40733837. The reversal of 40733821 is 12833704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40733821 - 2³ = 40733813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40733821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40733881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12501 + ... + 15418.

It is an arithmetic number, because the mean of its divisors is an integer number (10190800).

Almost surely, 2^40733821 is an apocalyptic number.

It is an amenable number.

40733821 is a deficient number, since it is larger than the sum of its proper divisors (29379).

40733821 is a wasteful number, since it uses less digits than its factorization.

40733821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29378.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40733821 is about 6382.3053045118. The cubic root of 40733821 is about 344.0738895045.

The spelling of 40733821 in words is "forty million, seven hundred thirty-three thousand, eight hundred twenty-one".