40047631 has 8 divisors (see below), whose sum is σ = 45665424. Its totient is φ = 34792320.

The previous prime is 40047599. The next prime is 40047641. The reversal of 40047631 is 13674004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40047631 - 2⁵ = 40047599 is a prime.

It is a super-2 number, since 2×40047631² = 3207625497424322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40047596 and 40047605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40047641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90385 + ... + 90826.

It is an arithmetic number, because the mean of its divisors is an integer number (5708178).

Almost surely, 2^40047631 is an apocalyptic number.

40047631 is a deficient number, since it is larger than the sum of its proper divisors (5617793).

40047631 is a wasteful number, since it uses less digits than its factorization.

40047631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181241.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 40047631 is about 6328.3197612004. The cubic root of 40047631 is about 342.1308819303.

The spelling of 40047631 in words is "forty million, forty-seven thousand, six hundred thirty-one".