28393020 has 36 divisors (see below), whose sum is σ = 86126040. Its totient is φ = 7571424.

The previous prime is 28393003. The next prime is 28393031. The reversal of 28393020 is 2039382.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78690 + ... + 79049.

It is an arithmetic number, because the mean of its divisors is an integer number (2392390).

Almost surely, 2^28393020 is an apocalyptic number.

28393020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28393020 is an abundant number, since it is smaller than the sum of its proper divisors (57733020).

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

28393020 is a wasteful number, since it uses less digits than its factorization.

28393020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157754 (or 157749 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 28393020 is about 5328.5101107158. The cubic root of 28393020 is about 305.0730632093.

The spelling of 28393020 in words is "twenty-eight million, three hundred ninety-three thousand, twenty".