1801388160 has 640 divisors, whose sum is σ = 7588848960. Its totient is φ = 403107840.

The previous prime is 1801388089. The next prime is 1801388189. The reversal of 1801388160 is 618831081.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138568314 + ... + 138568326.

Almost surely, 2^1801388160 is an apocalyptic number.

1801388160 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 1801388160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3794424480).

1801388160 is an abundant number, since it is smaller than the sum of its proper divisors (5787460800).

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

1801388160 is an frugal number, since it uses more digits than its factorization.

1801388160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1801388160 is about 42442.7633407628. The cubic root of 1801388160 is about 1216.7530250413.

The spelling of 1801388160 in words is "one billion, eight hundred one million, three hundred eighty-eight thousand, one hundred sixty".