38406287 has 2 divisors, whose sum is σ = 38406288. Its totient is φ = 38406286.

The previous prime is 38406283. The next prime is 38406293. The reversal of 38406287 is 78260483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38406287 - 2² = 38406283 is a prime.

It is a super-2 number, since 2×38406287² = 2950085762252738, which contains 22 as substring.

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 38406287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38406283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19203143 + 19203144.

It is an arithmetic number, because the mean of its divisors is an integer number (19203144).

Almost surely, 2^38406287 is an apocalyptic number.

38406287 is a deficient number, since it is larger than the sum of its proper divisors (1).

38406287 is an equidigital number, since it uses as much as digits as its factorization.

38406287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 38406287 is about 6197.2806133013. The cubic root of 38406287 is about 337.3914771339.

The spelling of 38406287 in words is "thirty-eight million, four hundred six thousand, two hundred eighty-seven".