40744161 has 16 divisors (see below), whose sum is σ = 61387200. Its totient is φ = 26701344.

The previous prime is 40744153. The next prime is 40744163. The reversal of 40744161 is 16144704.

It is not a de Polignac number, because 40744161 - 2³ = 40744153 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (40744163) 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, 11196 + ... + 14381.

It is an arithmetic number, because the mean of its divisors is an integer number (3836700).

Almost surely, 2^40744161 is an apocalyptic number.

It is an amenable number.

40744161 is a deficient number, since it is larger than the sum of its proper divisors (20643039).

40744161 is a wasteful number, since it uses less digits than its factorization.

40744161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25645 (or 25639 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40744161 is about 6383.1153052409. The cubic root of 40744161 is about 344.1030006374.

Adding to 40744161 its reverse (16144704), we get a palindrome (56888865).

The spelling of 40744161 in words is "forty million, seven hundred forty-four thousand, one hundred sixty-one".