1861473030 has 64 divisors (see below), whose sum is σ = 4727559168. Its totient is φ = 468110720.

The previous prime is 1861473013. The next prime is 1861473077. The reversal of 1861473030 is 303741681.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1861472982 and 1861473000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29992 + ... + 67988.

It is an arithmetic number, because the mean of its divisors is an integer number (73868112).

Almost surely, 2^1861473030 is an apocalyptic number.

1861473030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861473030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2363779584).

1861473030 is an abundant number, since it is smaller than the sum of its proper divisors (2866086138).

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

1861473030 is a wasteful number, since it uses less digits than its factorization.

1861473030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38101.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1861473030 is about 43144.7914585295. The cubic root of 1861473030 is about 1230.1335105257.

The spelling of 1861473030 in words is "one billion, eight hundred sixty-one million, four hundred seventy-three thousand, thirty".