38878687 has 2 divisors, whose sum is σ = 38878688. Its totient is φ = 38878686.

The previous prime is 38878661. The next prime is 38878727. The reversal of 38878687 is 78687883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38878687 - 2¹⁹ = 38354399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38878657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19439343 + 19439344.

It is an arithmetic number, because the mean of its divisors is an integer number (19439344).

Almost surely, 2^38878687 is an apocalyptic number.

38878687 is a deficient number, since it is larger than the sum of its proper divisors (1).

38878687 is an equidigital number, since it uses as much as digits as its factorization.

38878687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 55.

The square root of 38878687 is about 6235.2776201225. The cubic root of 38878687 is about 338.7691568348.

The spelling of 38878687 in words is "thirty-eight million, eight hundred seventy-eight thousand, six hundred eighty-seven".