40436691 has 16 divisors (see below), whose sum is σ = 56795904. Its totient is φ = 25540064.

The previous prime is 40436689. The next prime is 40436699. The reversal of 40436691 is 19663404.

It is a cyclic number.

It is not a de Polignac number, because 40436691 - 2¹ = 40436689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40436699) 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, 4645 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (3549744).

Almost surely, 2^40436691 is an apocalyptic number.

40436691 is a deficient number, since it is larger than the sum of its proper divisors (16359213).

40436691 is a wasteful number, since it uses less digits than its factorization.

40436691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40436691 is about 6358.9850605266. The cubic root of 40436691 is about 343.2352394116.

The spelling of 40436691 in words is "forty million, four hundred thirty-six thousand, six hundred ninety-one".