38018890 has 64 divisors (see below), whose sum is σ = 86365440. Its totient is φ = 11727360.

The previous prime is 38018887. The next prime is 38018891. The reversal of 38018890 is 9881083.

It is not an unprimeable number, because it can be changed into a prime (38018891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36801 + ... + 37819.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 2^38018890 is an apocalyptic number.

38018890 is an abundant number, since it is smaller than the sum of its proper divisors (48346550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38018890 is a wasteful number, since it uses less digits than its factorization.

38018890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 38018890 is about 6165.9459939250. The cubic root of 38018890 is about 336.2532399738.

The spelling of 38018890 in words is "thirty-eight million, eighteen thousand, eight hundred ninety".