38899987 has 8 divisors (see below), whose sum is σ = 45658976. Its totient is φ = 32441472.

The previous prime is 38899981. The next prime is 38900003. The reversal of 38899987 is 78999883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38899987 - 2¹¹ = 38897939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38899981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74838 + ... + 75355.

It is an arithmetic number, because the mean of its divisors is an integer number (5707372).

Almost surely, 2^38899987 is an apocalyptic number.

38899987 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

38899987 is a deficient number, since it is larger than the sum of its proper divisors (6758989).

38899987 is a wasteful number, since it uses less digits than its factorization.

38899987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150237.

The product of its digits is 7838208, while the sum is 61.

The square root of 38899987 is about 6236.9854096350. The cubic root of 38899987 is about 338.8310113388.

The spelling of 38899987 in words is "thirty-eight million, eight hundred ninety-nine thousand, nine hundred eighty-seven".