1781828930 has 64 divisors (see below), whose sum is σ = 3896156160. Its totient is φ = 573096384.

The previous prime is 1781828903. The next prime is 1781828941. The reversal of 1781828930 is 398281871.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130487 + ... + 143493.

It is an arithmetic number, because the mean of its divisors is an integer number (60877440).

Almost surely, 2^1781828930 is an apocalyptic number.

1781828930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1781828930 is an abundant number, since it is smaller than the sum of its proper divisors (2114327230).

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

1781828930 is a wasteful number, since it uses less digits than its factorization.

1781828930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13143.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 1781828930 is about 42211.7155538602. The cubic root of 1781828930 is about 1212.3332094945. Note that the first 3 decimals are identical.

The spelling of 1781828930 in words is "one billion, seven hundred eighty-one million, eight hundred twenty-eight thousand, nine hundred thirty".