1828783861 has 4 divisors (see below), whose sum is σ = 1832539552. Its totient is φ = 1825028172.

The previous prime is 1828783829. The next prime is 1828783907. The reversal of 1828783861 is 1683878281.

It is a happy number.

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: 1683878281 = 4297 ⋅391873.

It is a cyclic number.

It is not a de Polignac number, because 1828783861 - 2⁵ = 1828783829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1828783799 and 1828783808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828783661) 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, 1877115 + ... + 1878088.

It is an arithmetic number, because the mean of its divisors is an integer number (458134888).

Almost surely, 2^1828783861 is an apocalyptic number.

It is an amenable number.

1828783861 is a deficient number, since it is larger than the sum of its proper divisors (3755691).

1828783861 is an equidigital number, since it uses as much as digits as its factorization.

1828783861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755690.

The product of its digits is 1032192, while the sum is 52.

The square root of 1828783861 is about 42764.2825381182. The cubic root of 1828783861 is about 1222.8901872727.

The spelling of 1828783861 in words is "one billion, eight hundred twenty-eight million, seven hundred eighty-three thousand, eight hundred sixty-one".