40749 has 12 divisors (see below), whose sum is σ = 58944. Its totient is φ = 25024.

The previous prime is 40739. The next prime is 40751. The reversal of 40749 is 94704.

It is not a de Polignac number, because 40749 - 2⁸ = 40493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 844 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (4912).

2⁴⁰⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

40749 is a deficient number, since it is larger than the sum of its proper divisors (18195).

40749 is a wasteful number, since it uses less digits than its factorization.

40749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 40749 is about 201.8638154796. The cubic root of 40749 is about 34.4116622618.

The spelling of 40749 in words is "forty thousand, seven hundred forty-nine".