1038440081 has 4 divisors (see below), whose sum is σ = 1186788672. Its totient is φ = 890091492.

The previous prime is 1038440063. The next prime is 1038440083. The reversal of 1038440081 is 1800448301.

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 a cyclic number.

It is not a de Polignac number, because 1038440081 - 2¹⁴ = 1038423697 is a prime.

It is a super-2 number, since 2×1038440081² = 2156715603654573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1038440083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74174285 + ... + 74174298.

It is an arithmetic number, because the mean of its divisors is an integer number (296697168).

Almost surely, 2^1038440081 is an apocalyptic number.

It is an amenable number.

1038440081 is a deficient number, since it is larger than the sum of its proper divisors (148348591).

1038440081 is an equidigital number, since it uses as much as digits as its factorization.

1038440081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148348590.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1038440081 is about 32224.8363998950. The cubic root of 1038440081 is about 1012.6525969466.

Adding to 1038440081 its reverse (1800448301), we get a palindrome (2838888382).

The spelling of 1038440081 in words is "one billion, thirty-eight million, four hundred forty thousand, eighty-one".