1801972548 has 24 divisors (see below), whose sum is σ = 4671780960. Its totient is φ = 600657480.

The previous prime is 1801972481. The next prime is 1801972573. The reversal of 1801972548 is 8452791081.

1801972548 is a `hidden beast` number, since 18 + 0 + 1 + 97 + 2 + 548 = 666.

It is a super-2 number, since 2×1801972548² = 6494210127491224608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8342358 + ... + 8342573.

It is an arithmetic number, because the mean of its divisors is an integer number (194657540).

Almost surely, 2^1801972548 is an apocalyptic number.

1801972548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1801972548 is an abundant number, since it is smaller than the sum of its proper divisors (2869808412).

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

1801972548 is a wasteful number, since it uses less digits than its factorization.

1801972548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16684944 (or 16684936 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1801972548 is about 42449.6472070146. The cubic root of 1801972548 is about 1216.8845863571.

The spelling of 1801972548 in words is "one billion, eight hundred one million, nine hundred seventy-two thousand, five hundred forty-eight".