40623641 has 4 divisors (see below), whose sum is σ = 41230032. Its totient is φ = 40017252.

The previous prime is 40623607. The next prime is 40623643. The reversal of 40623641 is 14632604.

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 40623641 - 2¹⁴ = 40607257 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 40623641.

It is not an unprimeable number, because it can be changed into a prime (40623643) 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, 303095 + ... + 303228.

It is an arithmetic number, because the mean of its divisors is an integer number (10307508).

Almost surely, 2^40623641 is an apocalyptic number.

It is an amenable number.

40623641 is a deficient number, since it is larger than the sum of its proper divisors (606391).

40623641 is an equidigital number, since it uses as much as digits as its factorization.

40623641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606390.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40623641 is about 6373.6677823683. The cubic root of 40623641 is about 343.7633834569.

The spelling of 40623641 in words is "forty million, six hundred twenty-three thousand, six hundred forty-one".