38793981 has 4 divisors (see below), whose sum is σ = 51725312. Its totient is φ = 25862652.

The previous prime is 38793973. The next prime is 38794003. The reversal of 38793981 is 18939783.

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 38793981 - 2³ = 38793973 is a prime.

It is a super-2 number, since 2×38793981² = 3009945923656722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38793981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38793901) 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, 6465661 + ... + 6465666.

It is an arithmetic number, because the mean of its divisors is an integer number (12931328).

Almost surely, 2^38793981 is an apocalyptic number.

It is an amenable number.

38793981 is a deficient number, since it is larger than the sum of its proper divisors (12931331).

38793981 is a wasteful number, since it uses less digits than its factorization.

38793981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931330.

The product of its digits is 326592, while the sum is 48.

The square root of 38793981 is about 6228.4814361127. The cubic root of 38793981 is about 338.5229495701.

The spelling of 38793981 in words is "thirty-eight million, seven hundred ninety-three thousand, nine hundred eighty-one".