40140893 has 16 divisors (see below), whose sum is σ = 47018160. Its totient is φ = 33924096.

The previous prime is 40140883. The next prime is 40140899. The reversal of 40140893 is 39804104.

It can be written as a sum of positive squares in 8 ways, for example, as 10252804 + 29888089 = 3202^2 + 5467^2 .

It is a cyclic number.

It is not a de Polignac number, because 40140893 - 2⁶ = 40140829 is a prime.

It is a super-2 number, since 2×40140893² = 3222582581674898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140899) 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, 5723 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (2938635).

Almost surely, 2^40140893 is an apocalyptic number.

It is an amenable number.

40140893 is a deficient number, since it is larger than the sum of its proper divisors (6877267).

40140893 is a wasteful number, since it uses less digits than its factorization.

40140893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40140893 is about 6335.6840988168. The cubic root of 40140893 is about 342.3962582067.

Adding to 40140893 its reverse (39804104), we get a palindrome (79944997).

The spelling of 40140893 in words is "forty million, one hundred forty thousand, eight hundred ninety-three".