1863355480 has 64 divisors (see below), whose sum is σ = 4800732480. Its totient is φ = 637632000.

The previous prime is 1863355457. The next prime is 1863355489. The reversal of 1863355480 is 845533681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863355489) 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 15 ways as a sum of consecutive naturals, for example, 145330 + ... + 157630.

It is an arithmetic number, because the mean of its divisors is an integer number (75011445).

Almost surely, 2^1863355480 is an apocalyptic number.

1863355480 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 1863355480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400366240).

1863355480 is an abundant number, since it is smaller than the sum of its proper divisors (2937377000).

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

1863355480 is a wasteful number, since it uses less digits than its factorization.

1863355480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860 (or 12856 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 1863355480 is about 43166.6014413922. The cubic root of 1863355480 is about 1230.5480361265.

The spelling of 1863355480 in words is "one billion, eight hundred sixty-three million, three hundred fifty-five thousand, four hundred eighty".