28994020 has 36 divisors (see below), whose sum is σ = 66931452. Its totient is φ = 10542400.

The previous prime is 28993999. The next prime is 28994047. The reversal of 28994020 is 2049982.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 8054244 = 4576^2 + 2838^2 .

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, 3571 + ... + 8410.

It is an arithmetic number, because the mean of its divisors is an integer number (1859207).

Almost surely, 2^28994020 is an apocalyptic number.

28994020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28994020 is an abundant number, since it is smaller than the sum of its proper divisors (37937432).

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

28994020 is a wasteful number, since it uses less digits than its factorization.

28994020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12012 (or 11999 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28994020 is about 5384.6095494474. The cubic root of 28994020 is about 307.2105633529.

The spelling of 28994020 in words is "twenty-eight million, nine hundred ninety-four thousand, twenty".