28094020 has 24 divisors (see below), whose sum is σ = 60438168. Its totient is φ = 10963200.

The previous prime is 28094009. The next prime is 28094021. The reversal of 28094020 is 2049082.

It can be written as a sum of positive squares in 4 ways, for example, as 4260096 + 23833924 = 2064^2 + 4882^2 .

It is not an unprimeable number, because it can be changed into a prime (28094021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16311 + ... + 17950.

It is an arithmetic number, because the mean of its divisors is an integer number (2518257).

Almost surely, 2^28094020 is an apocalyptic number.

28094020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28094020 is an abundant number, since it is smaller than the sum of its proper divisors (32344148).

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

28094020 is a wasteful number, since it uses less digits than its factorization.

28094020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34311 (or 34309 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28094020 is about 5300.3792317154. The cubic root of 28094020 is about 303.9983985373.

The spelling of 28094020 in words is "twenty-eight million, ninety-four thousand, twenty".