28946660 has 12 divisors (see below), whose sum is σ = 60788028. Its totient is φ = 11578656.

The previous prime is 28946641. The next prime is 28946663. The reversal of 28946660 is 6664982.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 22676644 = 2504^2 + 4762^2 .

It is not an unprimeable number, because it can be changed into a prime (28946663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723647 + ... + 723686.

It is an arithmetic number, because the mean of its divisors is an integer number (5065669).

Almost surely, 2^28946660 is an apocalyptic number.

28946660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28946660 is an abundant number, since it is smaller than the sum of its proper divisors (31841368).

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

28946660 is a wasteful number, since it uses less digits than its factorization.

28946660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447342 (or 1447340 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 28946660 is about 5380.2100330749. The cubic root of 28946660 is about 307.0432021593.

The spelling of 28946660 in words is "twenty-eight million, nine hundred forty-six thousand, six hundred sixty".