38863989 has 32 divisors (see below), whose sum is σ = 61395840. Its totient is φ = 24212736.

The previous prime is 38863969. The next prime is 38863991. The reversal of 38863989 is 98936883.

It is not a de Polignac number, because 38863989 - 2¹² = 38859893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38863919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104007 + ... + 104379.

It is an arithmetic number, because the mean of its divisors is an integer number (1918620).

Almost surely, 2^38863989 is an apocalyptic number.

It is an amenable number.

38863989 is a deficient number, since it is larger than the sum of its proper divisors (22531851).

38863989 is a wasteful number, since it uses less digits than its factorization.

38863989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 620 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 38863989 is about 6234.0988923821. The cubic root of 38863989 is about 338.7264611486.

It can be divided in two parts, 3886 and 3989, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 38863989 in words is "thirty-eight million, eight hundred sixty-three thousand, nine hundred eighty-nine".