28431296 has 56 divisors (see below), whose sum is σ = 60228480. Its totient is φ = 13277952.

The previous prime is 28431269. The next prime is 28431313. The reversal of 28431296 is 69213482.

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, 125135 + ... + 125361.

Almost surely, 2^28431296 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 28431296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30114240).

28431296 is an abundant number, since it is smaller than the sum of its proper divisors (31797184).

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

28431296 is a wasteful number, since it uses less digits than its factorization.

28431296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 351 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 28431296 is about 5332.1005241837. The cubic root of 28431296 is about 305.2100890621.

The spelling of 28431296 in words is "twenty-eight million, four hundred thirty-one thousand, two hundred ninety-six".