38242981 has 6 divisors (see below), whose sum is σ = 44486790. Its totient is φ = 32779656.

The previous prime is 38242957. The next prime is 38242999. The reversal of 38242981 is 18924283.

It can be written as a sum of positive squares in only one way, i.e., 21473956 + 16769025 = 4634^2 + 4095^2 .

It is not a de Polignac number, because 38242981 - 2⁵ = 38242949 is a prime.

It is a super-2 number, since 2×38242981² = 2925051191532722, 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 38242981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38242921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390186 + ... + 390283.

It is an arithmetic number, because the mean of its divisors is an integer number (7414465).

Almost surely, 2^38242981 is an apocalyptic number.

It is an amenable number.

38242981 is a deficient number, since it is larger than the sum of its proper divisors (6243809).

38242981 is an equidigital number, since it uses as much as digits as its factorization.

38242981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780483 (or 780476 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 38242981 is about 6184.0909598744. The cubic root of 38242981 is about 336.9125943314.

The spelling of 38242981 in words is "thirty-eight million, two hundred forty-two thousand, nine hundred eighty-one".