38409887 has 4 divisors (see below), whose sum is σ = 40431480. Its totient is φ = 36388296.

The previous prime is 38409881. The next prime is 38409901. The reversal of 38409887 is 78890483.

38409887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38409887 - 2⁶ = 38409823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38409881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010768 + ... + 1010805.

It is an arithmetic number, because the mean of its divisors is an integer number (10107870).

Almost surely, 2^38409887 is an apocalyptic number.

38409887 is a deficient number, since it is larger than the sum of its proper divisors (2021593).

38409887 is a wasteful number, since it uses less digits than its factorization.

38409887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021592.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 38409887 is about 6197.5710564704. The cubic root of 38409887 is about 337.4020185623.

The spelling of 38409887 in words is "thirty-eight million, four hundred nine thousand, eight hundred eighty-seven".