38040981 has 8 divisors (see below), whose sum is σ = 55332384. Its totient is φ = 23055120.

The previous prime is 38040973. The next prime is 38040991. The reversal of 38040981 is 18904083.

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

It is not a de Polignac number, because 38040981 - 2³ = 38040973 is a prime.

It is a super-2 number, since 2×38040981² = 2894232470884722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1152757 = 38040981 / (3 + 8 + 0 + 4 + 0 + 9 + 8 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38040931) 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, 576346 + ... + 576411.

It is an arithmetic number, because the mean of its divisors is an integer number (6916548).

Almost surely, 2^38040981 is an apocalyptic number.

It is an amenable number.

38040981 is a deficient number, since it is larger than the sum of its proper divisors (17291403).

38040981 is a wasteful number, since it uses less digits than its factorization.

38040981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152771.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 38040981 is about 6167.7371052923. The cubic root of 38040981 is about 336.3183543776.

The spelling of 38040981 in words is "thirty-eight million, forty thousand, nine hundred eighty-one".