40436091 has 10 divisors (see below), whose sum is σ = 60404652. Its totient is φ = 26957340.

The previous prime is 40436083. The next prime is 40436101. The reversal of 40436091 is 19063404.

It is not a de Polignac number, because 40436091 - 2³ = 40436083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40436021) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 249525 + ... + 249686.

Almost surely, 2^40436091 is an apocalyptic number.

40436091 is a deficient number, since it is larger than the sum of its proper divisors (19968561).

40436091 is an equidigital number, since it uses as much as digits as its factorization.

40436091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499223 (or 499214 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 40436091 is about 6358.9378830116. The cubic root of 40436091 is about 343.2335417607.

Adding to 40436091 its reverse (19063404), we get a palindrome (59499495).

The spelling of 40436091 in words is "forty million, four hundred thirty-six thousand, ninety-one".