40909089 has 16 divisors (see below), whose sum is σ = 62197632. Its totient is φ = 23693568.

The previous prime is 40909081. The next prime is 40909097. The reversal of 40909089 is 98090904.

It is an interprime number because it is at equal distance from previous prime (40909081) and next prime (40909097).

It is not a de Polignac number, because 40909089 - 2³ = 40909081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40909081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30189 + ... + 31514.

It is an arithmetic number, because the mean of its divisors is an integer number (3887352).

Almost surely, 2^40909089 is an apocalyptic number.

It is an amenable number.

40909089 is a deficient number, since it is larger than the sum of its proper divisors (21288543).

40909089 is a wasteful number, since it uses less digits than its factorization.

40909089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61736.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 40909089 is about 6396.0213414278. The cubic root of 40909089 is about 344.5666729314.

The spelling of 40909089 in words is "forty million, nine hundred nine thousand, eighty-nine".