28440488143 has 32 divisors (see below), whose sum is σ = 31363200000. Its totient is φ = 25693065216.

The previous prime is 28440488119. The next prime is 28440488179. The reversal of 28440488143 is 34188404482.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28440488143 is a prime.

It is a super-2 number, since 2×28440488143² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28440488093 and 28440488102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28440480143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22769983 + ... + 22771231.

It is an arithmetic number, because the mean of its divisors is an integer number (980100000).

Almost surely, 2^28440488143 is an apocalyptic number.

28440488143 is a deficient number, since it is larger than the sum of its proper divisors (2922711857).

28440488143 is a wasteful number, since it uses less digits than its factorization.

28440488143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 786432, while the sum is 46.

The spelling of 28440488143 in words is "twenty-eight billion, four hundred forty million, four hundred eighty-eight thousand, one hundred forty-three".