1863473920 has 432 divisors, whose sum is σ = 5897168928. Its totient is φ = 557383680.

The previous prime is 1863473897. The next prime is 1863473923. The reversal of 1863473920 is 293743681.

It is not an unprimeable number, because it can be changed into a prime (1863473923) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 25527004 + ... + 25527076.

It is an arithmetic number, because the mean of its divisors is an integer number (13650854).

Almost surely, 2^1863473920 is an apocalyptic number.

1863473920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1863473920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2948584464).

1863473920 is an abundant number, since it is smaller than the sum of its proper divisors (4033695008).

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

1863473920 is a wasteful number, since it uses less digits than its factorization.

1863473920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1863473920 is about 43167.9733135574. The cubic root of 1863473920 is about 1230.5741079135.

The spelling of 1863473920 in words is "one billion, eight hundred sixty-three million, four hundred seventy-three thousand, nine hundred twenty".