38942887 has 4 divisors (see below), whose sum is σ = 40636080. Its totient is φ = 37249696.

The previous prime is 38942867. The next prime is 38942909. The reversal of 38942887 is 78824983.

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

It is a de Polignac number, because none of the positive numbers 2^k-38942887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38942887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38942857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846562 + ... + 846607.

It is an arithmetic number, because the mean of its divisors is an integer number (10159020).

Almost surely, 2^38942887 is an apocalyptic number.

38942887 is a deficient number, since it is larger than the sum of its proper divisors (1693193).

38942887 is a wasteful number, since it uses less digits than its factorization.

38942887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693192.

The product of its digits is 774144, while the sum is 49.

The square root of 38942887 is about 6240.4236234410. The cubic root of 38942887 is about 338.9555230354.

The spelling of 38942887 in words is "thirty-eight million, nine hundred forty-two thousand, eight hundred eighty-seven".