1138324681 has 36 divisors (see below), whose sum is σ = 1311284304. Its totient is φ = 987124320.

The previous prime is 1138324679. The next prime is 1138324723. The reversal of 1138324681 is 1864238311.

It is not a de Polignac number, because 1138324681 - 2¹ = 1138324679 is a prime.

It is a super-2 number, since 2×1138324681² = 2591566158747503522, 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 1138324681.

It is not an unprimeable number, because it can be changed into a prime (1138324661) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6983506 + ... + 6983668.

It is an arithmetic number, because the mean of its divisors is an integer number (36424564).

Almost surely, 2^1138324681 is an apocalyptic number.

It is an amenable number.

1138324681 is a deficient number, since it is larger than the sum of its proper divisors (172959623).

1138324681 is a wasteful number, since it uses less digits than its factorization.

1138324681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 250 counting only the distinct ones).

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

The square root of 1138324681 is about 33739.0675775132. The cubic root of 1138324681 is about 1044.1319473404.

The spelling of 1138324681 in words is "one billion, one hundred thirty-eight million, three hundred twenty-four thousand, six hundred eighty-one".