28840164 has 12 divisors (see below), whose sum is σ = 67293744. Its totient is φ = 9613384.

The previous prime is 28840153. The next prime is 28840193. The reversal of 28840164 is 46104882.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201662 + ... + 1201685.

It is an arithmetic number, because the mean of its divisors is an integer number (5607812).

Almost surely, 2^28840164 is an apocalyptic number.

It is an amenable number.

28840164 is an abundant number, since it is smaller than the sum of its proper divisors (38453580).

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

28840164 is a wasteful number, since it uses less digits than its factorization.

28840164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403354 (or 2403352 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28840164 is about 5370.3039020152. The cubic root of 28840164 is about 306.6661977519. Note that the first 3 decimals are identical.

The spelling of 28840164 in words is "twenty-eight million, eight hundred forty thousand, one hundred sixty-four".