38032281 has 96 divisors (see below), whose sum is σ = 73872000. Its totient is φ = 19160064.

The previous prime is 38032277. The next prime is 38032289. The reversal of 38032281 is 18223083.

38032281 is a `hidden beast` number, since 380 + 3 + 2 + 281 = 666.

38032281 is a nontrivial binomial coefficient, being equal to C(8722, 2).

It is not a de Polignac number, because 38032281 - 2² = 38032277 is a prime.

It is a super-2 number, since 2×38032281² = 2892908796125922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (38032289) 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 95 ways as a sum of consecutive naturals, for example, 427285 + ... + 427373.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^38032281 is an apocalyptic number.

38032281 is the 8721-st triangular number and also the 4361-st hexagonal number.

It is an amenable number.

38032281 is a deficient number, since it is larger than the sum of its proper divisors (35839719).

38032281 is a wasteful number, since it uses less digits than its factorization.

38032281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 38032281 is about 6167.0317819839. The cubic root of 38032281 is about 336.2927136721.

It can be divided in two parts, 3803 and 2281, that added together give a square (6084 = 78²).

The spelling of 38032281 in words is "thirty-eight million, thirty-two thousand, two hundred eighty-one".