40161723 has 24 divisors (see below), whose sum is σ = 64446480. Its totient is φ = 22155840.

The previous prime is 40161721. The next prime is 40161731. The reversal of 40161723 is 32716104.

It is not a de Polignac number, because 40161723 - 2¹ = 40161721 is a prime.

It is a super-2 number, since 2×40161723² = 3225927988657458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40161693 and 40161702.

It is not an unprimeable number, because it can be changed into a prime (40161721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (2685270).

Almost surely, 2^40161723 is an apocalyptic number.

40161723 is a deficient number, since it is larger than the sum of its proper divisors (24284757).

40161723 is a wasteful number, since it uses less digits than its factorization.

40161723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467 (or 9460 counting only the distinct ones).

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

The square root of 40161723 is about 6337.3277491384. The cubic root of 40161723 is about 342.4554736369.

Adding to 40161723 its reverse (32716104), we get a palindrome (72877827).

The spelling of 40161723 in words is "forty million, one hundred sixty-one thousand, seven hundred twenty-three".