38990281 has 16 divisors (see below), whose sum is σ = 44352000. Its totient is φ = 33955200.

The previous prime is 38990279. The next prime is 38990291. The reversal of 38990281 is 18209983.

38990281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 38990281 - 2¹ = 38990279 is a prime.

It is a super-2 number, since 2×38990281² = 3040484024917922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38990251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36645 + ... + 37693.

It is an arithmetic number, because the mean of its divisors is an integer number (2772000).

Almost surely, 2^38990281 is an apocalyptic number.

38990281 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38990281 is the 2793-rd centered decagonal number.

It is an amenable number.

38990281 is a deficient number, since it is larger than the sum of its proper divisors (5361719).

38990281 is a wasteful number, since it uses less digits than its factorization.

38990281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 38990281 is about 6244.2198071496. The cubic root of 38990281 is about 339.0929717183.

It can be divided in two parts, 389902 and 81, that added together give a palindrome (389983).

The spelling of 38990281 in words is "thirty-eight million, nine hundred ninety thousand, two hundred eighty-one".