40628569 has 4 divisors (see below), whose sum is σ = 41939200. Its totient is φ = 39317940.

The previous prime is 40628561. The next prime is 40628573. The reversal of 40628569 is 96582604.

It is a happy number.

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 40628569 - 2³ = 40628561 is a prime.

It is a super-2 number, since 2×40628569² = 3301361237975522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40628561) 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, 655269 + ... + 655330.

It is an arithmetic number, because the mean of its divisors is an integer number (10484800).

Almost surely, 2^40628569 is an apocalyptic number.

It is an amenable number.

40628569 is a deficient number, since it is larger than the sum of its proper divisors (1310631).

40628569 is a wasteful number, since it uses less digits than its factorization.

40628569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310630.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 40628569 is about 6374.0543612367. The cubic root of 40628569 is about 343.7772833882. Note that the first 3 decimals are identical.

The spelling of 40628569 in words is "forty million, six hundred twenty-eight thousand, five hundred sixty-nine".