169280028 has 36 divisors (see below), whose sum is σ = 428861160. Its totient is φ = 56300256.

The previous prime is 169280017. The next prime is 169280071. The reversal of 169280028 is 820082961.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 169279974 and 169280001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11778 + ... + 21846.

It is an arithmetic number, because the mean of its divisors is an integer number (11912810).

Almost surely, 2^169280028 is an apocalyptic number.

169280028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

169280028 is an abundant number, since it is smaller than the sum of its proper divisors (259581132).

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

169280028 is a wasteful number, since it uses less digits than its factorization.

169280028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10546 (or 10541 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 169280028 is about 13010.7658498645. The cubic root of 169280028 is about 553.1826800713.

The spelling of 169280028 in words is "one hundred sixty-nine million, two hundred eighty thousand, twenty-eight".