1826140385 has 4 divisors (see below), whose sum is σ = 2191368468. Its totient is φ = 1460912304.

The previous prime is 1826140367. The next prime is 1826140417. The reversal of 1826140385 is 5830416281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 782656576 + 1043483809 = 27976^2 + 32303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1826140385 - 2⁶ = 1826140321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182614034 + ... + 182614043.

It is an arithmetic number, because the mean of its divisors is an integer number (547842117).

Almost surely, 2^1826140385 is an apocalyptic number.

It is an amenable number.

1826140385 is a deficient number, since it is larger than the sum of its proper divisors (365228083).

1826140385 is an equidigital number, since it uses as much as digits as its factorization.

1826140385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365228082.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1826140385 is about 42733.3638390427. The cubic root of 1826140385 is about 1222.3006808112.

The spelling of 1826140385 in words is "one billion, eight hundred twenty-six million, one hundred forty thousand, three hundred eighty-five".