40823421 has 4 divisors (see below), whose sum is σ = 54431232. Its totient is φ = 27215612.

The previous prime is 40823411. The next prime is 40823441. The reversal of 40823421 is 12432804.

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 40823421 - 2⁹ = 40822909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40823391 and 40823400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40823411) 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 3 ways as a sum of consecutive naturals, for example, 6803901 + ... + 6803906.

It is an arithmetic number, because the mean of its divisors is an integer number (13607808).

Almost surely, 2^40823421 is an apocalyptic number.

It is an amenable number.

40823421 is a deficient number, since it is larger than the sum of its proper divisors (13607811).

40823421 is a wasteful number, since it uses less digits than its factorization.

40823421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607810.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 40823421 is about 6389.3208559283. The cubic root of 40823421 is about 344.3259850443.

It can be divided in two parts, 4082 and 3421, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 40823421 in words is "forty million, eight hundred twenty-three thousand, four hundred twenty-one".