40120569 has 8 divisors (see below), whose sum is σ = 59437920. Its totient is φ = 26747028.

The previous prime is 40120559. The next prime is 40120573. The reversal of 40120569 is 96502104.

It is not a de Polignac number, because 40120569 - 2⁹ = 40120057 is a prime.

It is a super-2 number, since 2×40120569² = 3219320113767522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1485947 = 40120569 / (4 + 0 + 1 + 2 + 0 + 5 + 6 + 9).

It is not an unprimeable number, because it can be changed into a prime (40120519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742947 + ... + 743000.

It is an arithmetic number, because the mean of its divisors is an integer number (7429740).

Almost surely, 2^40120569 is an apocalyptic number.

It is an amenable number.

40120569 is a deficient number, since it is larger than the sum of its proper divisors (19317351).

40120569 is a wasteful number, since it uses less digits than its factorization.

40120569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485956 (or 1485950 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 40120569 is about 6334.0799647620. The cubic root of 40120569 is about 342.3384614827.

The spelling of 40120569 in words is "forty million, one hundred twenty thousand, five hundred sixty-nine".