28042764 has 12 divisors (see below), whose sum is σ = 65433144. Its totient is φ = 9347584.

The previous prime is 28042733. The next prime is 28042787. The reversal of 28042764 is 46724082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28042764² = 1572793225519392, which contains 22 as substring.

It is an unprimeable number.

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, 1168437 + ... + 1168460.

It is an arithmetic number, because the mean of its divisors is an integer number (5452762).

Almost surely, 2^28042764 is an apocalyptic number.

It is an amenable number.

28042764 is an abundant number, since it is smaller than the sum of its proper divisors (37390380).

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

28042764 is a wasteful number, since it uses less digits than its factorization.

28042764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336904 (or 2336902 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 28042764 is about 5295.5418986162. The cubic root of 28042764 is about 303.8134098511.

The spelling of 28042764 in words is "twenty-eight million, forty-two thousand, seven hundred sixty-four".