1801115280 has 240 divisors, whose sum is σ = 6418803456. Its totient is φ = 451630080.

The previous prime is 1801115231. The next prime is 1801115311. The reversal of 1801115280 is 825111081.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1009269 + ... + 1011051.

Almost surely, 2^1801115280 is an apocalyptic number.

1801115280 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 1801115280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3209401728).

1801115280 is an abundant number, since it is smaller than the sum of its proper divisors (4617688176).

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

1801115280 is a wasteful number, since it uses less digits than its factorization.

1801115280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 27.

The square root of 1801115280 is about 42439.5485367128. The cubic root of 1801115280 is about 1216.6915827345.

The spelling of 1801115280 in words is "one billion, eight hundred one million, one hundred fifteen thousand, two hundred eighty".