38248981 has 4 divisors (see below), whose sum is σ = 38263264. Its totient is φ = 38234700.

The previous prime is 38248979. The next prime is 38248993. The reversal of 38248981 is 18984283.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18984283 = 157 ⋅120919.

It is a 3-Lehmer number, since φ(38248981) divides (38248981-1)³.

It is a cyclic number.

It is not a de Polignac number, because 38248981 - 2¹ = 38248979 is a prime.

It is a super-2 number, since 2×38248981² = 2925969095076722, which contains 22 as substring.

It is a deceptive number, since it divides R_38248980.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38248901) 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 3 ways as a sum of consecutive naturals, for example, 1785 + ... + 8926.

It is an arithmetic number, because the mean of its divisors is an integer number (9565816).

Almost surely, 2^38248981 is an apocalyptic number.

38248981 is the 3571-st octagonal number.

It is an amenable number.

38248981 is a deficient number, since it is larger than the sum of its proper divisors (14283).

38248981 is a wasteful number, since it uses less digits than its factorization.

38248981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14282.

The product of its digits is 110592, while the sum is 43.

The square root of 38248981 is about 6184.5760566105. The cubic root of 38248981 is about 336.9302129881.

The spelling of 38248981 in words is "thirty-eight million, two hundred forty-eight thousand, nine hundred eighty-one".