38403281 has 8 divisors (see below), whose sum is σ = 43992960. Its totient is φ = 32839488.

The previous prime is 38403271. The next prime is 38403317. The reversal of 38403281 is 18230483.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38403281 is a prime.

It is a super-2 number, since 2×38403281² = 2949623983129922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38403271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3176 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (5499120).

Almost surely, 2^38403281 is an apocalyptic number.

It is an amenable number.

38403281 is a deficient number, since it is larger than the sum of its proper divisors (5589679).

38403281 is a wasteful number, since it uses less digits than its factorization.

38403281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12943.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 38403281 is about 6197.0380828263. The cubic root of 38403281 is about 337.3826745365.

The spelling of 38403281 in words is "thirty-eight million, four hundred three thousand, two hundred eighty-one".