40144771 has 4 divisors (see below), whose sum is σ = 40802944. Its totient is φ = 39486600.

The previous prime is 40144763. The next prime is 40144789. The reversal of 40144771 is 17744104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40144771 - 2³ = 40144763 is a prime.

It is a super-2 number, since 2×40144771² = 3223205277284882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40144751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328995 + ... + 329116.

It is an arithmetic number, because the mean of its divisors is an integer number (10200736).

Almost surely, 2^40144771 is an apocalyptic number.

40144771 is a deficient number, since it is larger than the sum of its proper divisors (658173).

40144771 is an equidigital number, since it uses as much as digits as its factorization.

40144771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658172.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 40144771 is about 6335.9901357246. The cubic root of 40144771 is about 342.4072841193.

Adding to 40144771 its reverse (17744104), we get a palindrome (57888875).

The spelling of 40144771 in words is "forty million, one hundred forty-four thousand, seven hundred seventy-one".