40641469 has 4 divisors (see below), whose sum is σ = 44336160. Its totient is φ = 36946780.

The previous prime is 40641457. The next prime is 40641473. The reversal of 40641469 is 96414604.

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 a de Polignac number, because none of the positive numbers 2^k-40641469 is a prime.

It is a super-2 number, since 2×40641469² = 3303458004955922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641409) 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, 1847329 + ... + 1847350.

It is an arithmetic number, because the mean of its divisors is an integer number (11084040).

Almost surely, 2^40641469 is an apocalyptic number.

It is an amenable number.

40641469 is a deficient number, since it is larger than the sum of its proper divisors (3694691).

40641469 is a wasteful number, since it uses less digits than its factorization.

40641469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694690.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40641469 is about 6375.0661957348. The cubic root of 40641469 is about 343.8136638448.

The spelling of 40641469 in words is "forty million, six hundred forty-one thousand, four hundred sixty-nine".