28164740 has 24 divisors (see below), whose sum is σ = 61055232. Its totient is φ = 10902240.

The previous prime is 28164691. The next prime is 28164749. The reversal of 28164740 is 4746182.

It is a junction number, because it is equal to n+sod(n) for n = 28164697 and 28164706.

It is not an unprimeable number, because it can be changed into a prime (28164749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22094 + ... + 23333.

It is an arithmetic number, because the mean of its divisors is an integer number (2543968).

Almost surely, 2^28164740 is an apocalyptic number.

28164740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28164740 is an abundant number, since it is smaller than the sum of its proper divisors (32890492).

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

28164740 is a wasteful number, since it uses less digits than its factorization.

28164740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45467 (or 45465 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28164740 is about 5307.0462594554. The cubic root of 28164740 is about 304.2532659739.

The spelling of 28164740 in words is "twenty-eight million, one hundred sixty-four thousand, seven hundred forty".