40000311 has 20 divisors (see below), whose sum is σ = 64351672. Its totient is φ = 24614928.

The previous prime is 40000291. The next prime is 40000313. The reversal of 40000311 is 11300004.

It is not a de Polignac number, because 40000311 - 2⁷ = 40000183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40000293 and 40000302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000313) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17941 + ... + 20046.

Almost surely, 2^40000311 is an apocalyptic number.

40000311 is a deficient number, since it is larger than the sum of its proper divisors (24351361).

40000311 is a wasteful number, since it uses less digits than its factorization.

40000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38012 (or 38003 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 40000311 is about 6324.5799069978. The cubic root of 40000311 is about 341.9960756706.

Adding to 40000311 its reverse (11300004), we get a palindrome (51300315).

The spelling of 40000311 in words is "forty million, three hundred eleven", and thus it is an aban number.