40389111 has 20 divisors (see below), whose sum is σ = 68954512. Its totient is φ = 23079168.

The previous prime is 40389109. The next prime is 40389119. The reversal of 40389111 is 11198304.

It is not a de Polignac number, because 40389111 - 2¹ = 40389109 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35050 + ... + 36183.

Almost surely, 2^40389111 is an apocalyptic number.

40389111 is a deficient number, since it is larger than the sum of its proper divisors (28565401).

40389111 is an equidigital number, since it uses as much as digits as its factorization.

40389111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71252 (or 71243 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 40389111 is about 6355.2427963061. The cubic root of 40389111 is about 343.1005635200.

The spelling of 40389111 in words is "forty million, three hundred eighty-nine thousand, one hundred eleven".