38540431 has 2 divisors, whose sum is σ = 38540432. Its totient is φ = 38540430.

The previous prime is 38540413. The next prime is 38540443. The reversal of 38540431 is 13404583.

Together with previous prime (38540413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38540431 - 2¹³ = 38532239 is a prime.

It is a super-2 number, since 2×38540431² = 2970729643331522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38540431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38540461) 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 as a sum of consecutive naturals, namely, 19270215 + 19270216.

It is an arithmetic number, because the mean of its divisors is an integer number (19270216).

Almost surely, 2^38540431 is an apocalyptic number.

38540431 is a deficient number, since it is larger than the sum of its proper divisors (1).

38540431 is an equidigital number, since it uses as much as digits as its factorization.

38540431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 38540431 is about 6208.0939909122. The cubic root of 38540431 is about 337.7838300084.

The spelling of 38540431 in words is "thirty-eight million, five hundred forty thousand, four hundred thirty-one".