40689811 has 4 divisors (see below), whose sum is σ = 42831400. Its totient is φ = 38548224.

The previous prime is 40689799. The next prime is 40689839. The reversal of 40689811 is 11898604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40689811 - 2²⁵ = 7135379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40680811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070766 + ... + 1070803.

It is an arithmetic number, because the mean of its divisors is an integer number (10707850).

Almost surely, 2^40689811 is an apocalyptic number.

40689811 is a deficient number, since it is larger than the sum of its proper divisors (2141589).

40689811 is a wasteful number, since it uses less digits than its factorization.

40689811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141588.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 40689811 is about 6378.8565589767. The cubic root of 40689811 is about 343.9499290517.

The spelling of 40689811 in words is "forty million, six hundred eighty-nine thousand, eight hundred eleven".