38040731 has 2 divisors, whose sum is σ = 38040732. Its totient is φ = 38040730.

The previous prime is 38040683. The next prime is 38040733. The reversal of 38040731 is 13704083.

It is a strong prime.

It is an emirp because it is prime and its reverse (13704083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38040731 - 2¹⁰ = 38039707 is a prime.

It is a super-2 number, since 2×38040731² = 2894194430028722, which contains 22 as substring.

Together with 38040733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38040731.

It is not a weakly prime, because it can be changed into another prime (38040733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19020365 + 19020366.

It is an arithmetic number, because the mean of its divisors is an integer number (19020366).

Almost surely, 2^38040731 is an apocalyptic number.

38040731 is a deficient number, since it is larger than the sum of its proper divisors (1).

38040731 is an equidigital number, since it uses as much as digits as its factorization.

38040731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 38040731 is about 6167.7168385068. The cubic root of 38040731 is about 336.3176176302.

The spelling of 38040731 in words is "thirty-eight million, forty thousand, seven hundred thirty-one".