40111889 has 4 divisors (see below), whose sum is σ = 40240356. Its totient is φ = 39983424.

The previous prime is 40111879. The next prime is 40111909. The reversal of 40111889 is 98811104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11937025 + 28174864 = 3455^2 + 5308^2 .

It is a cyclic number.

It is not a de Polignac number, because 40111889 - 2⁴ = 40111873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40111829) 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, 63764 + ... + 64389.

It is an arithmetic number, because the mean of its divisors is an integer number (10060089).

Almost surely, 2^40111889 is an apocalyptic number.

It is an amenable number.

40111889 is a deficient number, since it is larger than the sum of its proper divisors (128467).

40111889 is a wasteful number, since it uses less digits than its factorization.

40111889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128466.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 40111889 is about 6333.3947453163. The cubic root of 40111889 is about 342.3137716354.

The spelling of 40111889 in words is "forty million, one hundred eleven thousand, eight hundred eighty-nine".