4020040631 has 4 divisors (see below), whose sum is σ = 4113529992. Its totient is φ = 3926551272.

The previous prime is 4020040627. The next prime is 4020040637. The reversal of 4020040631 is 1360400204.

It is a happy number.

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 4020040631 - 2² = 4020040627 is a prime.

It is a super-3 number, since 3×4020040631³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020040637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46744616 + ... + 46744701.

It is an arithmetic number, because the mean of its divisors is an integer number (1028382498).

Almost surely, 2^4020040631 is an apocalyptic number.

4020040631 is a deficient number, since it is larger than the sum of its proper divisors (93489361).

4020040631 is an equidigital number, since it uses as much as digits as its factorization.

4020040631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93489360.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4020040631 is about 63403.7903519971. The cubic root of 4020040631 is about 1590.0476800965.

Adding to 4020040631 its reverse (1360400204), we get a palindrome (5380440835).

The spelling of 4020040631 in words is "four billion, twenty million, forty thousand, six hundred thirty-one".