28434812 has 96 divisors (see below), whose sum is σ = 65028096. Its totient is φ = 10598400.

The previous prime is 28434797. The next prime is 28434817. The reversal of 28434812 is 21843482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28434817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604973 + ... + 605019.

It is an arithmetic number, because the mean of its divisors is an integer number (677376).

Almost surely, 2^28434812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28434812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32514048).

28434812 is an abundant number, since it is smaller than the sum of its proper divisors (36593284).

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

28434812 is a wasteful number, since it uses less digits than its factorization.

28434812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 145 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 28434812 is about 5332.4302152021. The cubic root of 28434812 is about 305.2226699687. Note that the first 3 decimals are identical.

The spelling of 28434812 in words is "twenty-eight million, four hundred thirty-four thousand, eight hundred twelve".