38531889 has 16 divisors (see below), whose sum is σ = 62274240. Its totient is φ = 23352480.

The previous prime is 38531887. The next prime is 38531891. The reversal of 38531889 is 98813583.

38531889 is a `hidden beast` number, since 38 + 531 + 8 + 89 = 666.

It is an interprime number because it is at equal distance from previous prime (38531887) and next prime (38531891).

It is not a de Polignac number, because 38531889 - 2¹ = 38531887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38531881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64572 + ... + 65165.

It is an arithmetic number, because the mean of its divisors is an integer number (3892140).

Almost surely, 2^38531889 is an apocalyptic number.

It is an amenable number.

38531889 is a deficient number, since it is larger than the sum of its proper divisors (23742351).

38531889 is a wasteful number, since it uses less digits than its factorization.

38531889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129757 (or 129751 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 38531889 is about 6207.4059799565. The cubic root of 38531889 is about 337.7588729905.

The spelling of 38531889 in words is "thirty-eight million, five hundred thirty-one thousand, eight hundred eighty-nine".