1826815380 has 48 divisors (see below), whose sum is σ = 5508553344. Its totient is φ = 449677440.

The previous prime is 1826815379. The next prime is 1826815447. The reversal of 1826815380 is 835186281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170256 + ... + 1171815.

It is an arithmetic number, because the mean of its divisors is an integer number (114761528).

Almost surely, 2^1826815380 is an apocalyptic number.

1826815380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1826815380 is an abundant number, since it is smaller than the sum of its proper divisors (3681737964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1826815380 is a wasteful number, since it uses less digits than its factorization.

1826815380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342096 (or 2342094 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 1826815380 is about 42741.2608611398. The cubic root of 1826815380 is about 1222.4512616432.

The spelling of 1826815380 in words is "one billion, eight hundred twenty-six million, eight hundred fifteen thousand, three hundred eighty".