38890281 has 4 divisors (see below), whose sum is σ = 51853712. Its totient is φ = 25926852.

The previous prime is 38890279. The next prime is 38890289. The reversal of 38890281 is 18209883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 38890281 - 2¹ = 38890279 is a prime.

It is a super-2 number, since 2×38890281² = 3024907912517922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38890289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6481711 + ... + 6481716.

It is an arithmetic number, because the mean of its divisors is an integer number (12963428).

Almost surely, 2^38890281 is an apocalyptic number.

It is an amenable number.

38890281 is a deficient number, since it is larger than the sum of its proper divisors (12963431).

38890281 is a wasteful number, since it uses less digits than its factorization.

38890281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12963430.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 38890281 is about 6236.2072608277. The cubic root of 38890281 is about 338.8028282329.

The spelling of 38890281 in words is "thirty-eight million, eight hundred ninety thousand, two hundred eighty-one".