40279569 has 24 divisors (see below), whose sum is σ = 60648000. Its totient is φ = 23744160.

The previous prime is 40279553. The next prime is 40279573. The reversal of 40279569 is 96597204.

It is not a de Polignac number, because 40279569 - 2⁴ = 40279553 is a prime.

It is a super-2 number, since 2×40279569² = 3244887357651522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40279569.

It is not an unprimeable number, because it can be changed into a prime (40279549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11932 + ... + 14930.

It is an arithmetic number, because the mean of its divisors is an integer number (2527000).

Almost surely, 2^40279569 is an apocalyptic number.

It is an amenable number.

40279569 is a deficient number, since it is larger than the sum of its proper divisors (20368431).

40279569 is a wasteful number, since it uses less digits than its factorization.

40279569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 40279569 is about 6346.6187060513. The cubic root of 40279569 is about 342.7901007059.

The spelling of 40279569 in words is "forty million, two hundred seventy-nine thousand, five hundred sixty-nine".