1826909985 has 16 divisors (see below), whose sum is σ = 2948926464. Its totient is φ = 965728512.

The previous prime is 1826909969. The next prime is 1826909989. The reversal of 1826909985 is 5899096281.

1826909985 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1826909985 - 2⁴ = 1826909969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1826909989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537217 + ... + 540606.

It is an arithmetic number, because the mean of its divisors is an integer number (184307904).

Almost surely, 2^1826909985 is an apocalyptic number.

1826909985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1826909985 is a deficient number, since it is larger than the sum of its proper divisors (1122016479).

1826909985 is a wasteful number, since it uses less digits than its factorization.

1826909985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077944.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1826909985 is about 42742.3675642798. The cubic root of 1826909985 is about 1222.4723635758.

The spelling of 1826909985 in words is "one billion, eight hundred twenty-six million, nine hundred nine thousand, nine hundred eighty-five".