38729407 has 2 divisors, whose sum is σ = 38729408. Its totient is φ = 38729406.

The previous prime is 38729389. The next prime is 38729441. The reversal of 38729407 is 70492783.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38729407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38729407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38729107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19364703 + 19364704.

It is an arithmetic number, because the mean of its divisors is an integer number (19364704).

Almost surely, 2^38729407 is an apocalyptic number.

38729407 is a deficient number, since it is larger than the sum of its proper divisors (1).

38729407 is an equidigital number, since it uses as much as digits as its factorization.

38729407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 38729407 is about 6223.2955096155. The cubic root of 38729407 is about 338.3350173152.

The spelling of 38729407 in words is "thirty-eight million, seven hundred twenty-nine thousand, four hundred seven".