28161494960 has 40 divisors (see below), whose sum is σ = 66264352560. Its totient is φ = 11128877312.

The previous prime is 28161494939. The next prime is 28161495029. The reversal of 28161494960 is 6949416182.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 28161494899 and 28161494908.

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, 2113955 + ... + 2127234.

It is an arithmetic number, because the mean of its divisors is an integer number (1656608814).

Almost surely, 2^28161494960 is an apocalyptic number.

28161494960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28161494960 is an abundant number, since it is smaller than the sum of its proper divisors (38102857600).

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

28161494960 is a wasteful number, since it uses less digits than its factorization.

28161494960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241285 (or 4241279 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 28161494960 in words is "twenty-eight billion, one hundred sixty-one million, four hundred ninety-four thousand, nine hundred sixty".