40408569 has 12 divisors (see below), whose sum is σ = 59358000. Its totient is φ = 26482104.

The previous prime is 40408567. The next prime is 40408583. The reversal of 40408569 is 96580404.

It is not a de Polignac number, because 40408569 - 2¹ = 40408567 is a prime.

It is a super-2 number, since 2×40408569² = 3265704897255522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40408567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37519 + ... + 38580.

It is an arithmetic number, because the mean of its divisors is an integer number (4946500).

Almost surely, 2^40408569 is an apocalyptic number.

It is an amenable number.

40408569 is a deficient number, since it is larger than the sum of its proper divisors (18949431).

40408569 is a wasteful number, since it uses less digits than its factorization.

40408569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76164 (or 76161 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 40408569 is about 6356.7734740197. The cubic root of 40408569 is about 343.1556524519.

The spelling of 40408569 in words is "forty million, four hundred eight thousand, five hundred sixty-nine".