38402447 has 2 divisors, whose sum is σ = 38402448. Its totient is φ = 38402446.

The previous prime is 38402443. The next prime is 38402461. The reversal of 38402447 is 74420483.

It is a weak prime.

It is an emirp because it is prime and its reverse (74420483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38402447 - 2² = 38402443 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38402443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19201223 + 19201224.

It is an arithmetic number, because the mean of its divisors is an integer number (19201224).

Almost surely, 2^38402447 is an apocalyptic number.

38402447 is a deficient number, since it is larger than the sum of its proper divisors (1).

38402447 is an equidigital number, since it uses as much as digits as its factorization.

38402447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 38402447 is about 6196.9707922500. The cubic root of 38402447 is about 337.3802322176.

The spelling of 38402447 in words is "thirty-eight million, four hundred two thousand, four hundred forty-seven".