1826798381 has 4 divisors (see below), whose sum is σ = 1845631452. Its totient is φ = 1807965312.

The previous prime is 1826798333. The next prime is 1826798387. The reversal of 1826798381 is 1838976281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1838976281 = 797 ⋅2307373.

It can be written as a sum of positive squares in 2 ways, for example, as 452242756 + 1374555625 = 21266^2 + 37075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1826798381 - 2⁶ = 1826798317 is a prime.

It is a super-2 number, since 2×1826798381² = 6674384649648442322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826798387) 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, 9416390 + ... + 9416583.

It is an arithmetic number, because the mean of its divisors is an integer number (461407863).

Almost surely, 2^1826798381 is an apocalyptic number.

It is an amenable number.

1826798381 is a deficient number, since it is larger than the sum of its proper divisors (18833071).

1826798381 is an equidigital number, since it uses as much as digits as its factorization.

1826798381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18833070.

The product of its digits is 1161216, while the sum is 53.

The square root of 1826798381 is about 42741.0620013120. The cubic root of 1826798381 is about 1222.4474698874.

The spelling of 1826798381 in words is "one billion, eight hundred twenty-six million, seven hundred ninety-eight thousand, three hundred eighty-one".