28474960 has 20 divisors (see below), whose sum is σ = 66204468. Its totient is φ = 11389952.

The previous prime is 28474931. The next prime is 28474961. The reversal of 28474960 is 6947482.

It can be written as a sum of positive squares in 2 ways, for example, as 3594816 + 24880144 = 1896^2 + 4988^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28474961) 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, 177889 + ... + 178048.

Almost surely, 2^28474960 is an apocalyptic number.

28474960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28474960 is an abundant number, since it is smaller than the sum of its proper divisors (37729508).

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

28474960 is a wasteful number, since it uses less digits than its factorization.

28474960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355950 (or 355944 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28474960 is about 5336.1933997935. The cubic root of 28474960 is about 305.3662535564.

The spelling of 28474960 in words is "twenty-eight million, four hundred seventy-four thousand, nine hundred sixty".