28905072 has 40 divisors (see below), whose sum is σ = 85339776. Its totient is φ = 8258496.

The previous prime is 28905059. The next prime is 28905133. The reversal of 28905072 is 27050982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42678 + ... + 43349.

Almost surely, 2^28905072 is an apocalyptic number.

It is an amenable number.

28905072 is an abundant number, since it is smaller than the sum of its proper divisors (56434704).

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

28905072 is a wasteful number, since it uses less digits than its factorization.

28905072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86045 (or 86039 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 28905072 is about 5376.3437390107. The cubic root of 28905072 is about 306.8960875141.

The spelling of 28905072 in words is "twenty-eight million, nine hundred five thousand, seventy-two".