40386631 has 2 divisors, whose sum is σ = 40386632. Its totient is φ = 40386630.

The previous prime is 40386623. The next prime is 40386649. The reversal of 40386631 is 13668304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40386631 - 2³ = 40386623 is a prime.

It is a super-2 number, since 2×40386631² = 3262159927060322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40386593 and 40386602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40386691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20193315 + 20193316.

It is an arithmetic number, because the mean of its divisors is an integer number (20193316).

Almost surely, 2^40386631 is an apocalyptic number.

40386631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40386631 is an equidigital number, since it uses as much as digits as its factorization.

40386631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40386631 is about 6355.0476788141. The cubic root of 40386631 is about 343.0935409439.

The spelling of 40386631 in words is "forty million, three hundred eighty-six thousand, six hundred thirty-one".