1801640928 has 48 divisors (see below), whose sum is σ = 4753123200. Its totient is φ = 597522816.

The previous prime is 1801640927. The next prime is 1801640941. The reversal of 1801640928 is 8290461081.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801640927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28050 + ... + 66257.

It is an arithmetic number, because the mean of its divisors is an integer number (99023400).

Almost surely, 2^1801640928 is an apocalyptic number.

It is an amenable number.

1801640928 is an abundant number, since it is smaller than the sum of its proper divisors (2951482272).

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

1801640928 is a wasteful number, since it uses less digits than its factorization.

1801640928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94519 (or 94511 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1801640928 is about 42445.7409877599. The cubic root of 1801640928 is about 1216.8099333471.

The spelling of 1801640928 in words is "one billion, eight hundred one million, six hundred forty thousand, nine hundred twenty-eight".