28937280 has 112 divisors (see below), whose sum is σ = 94146624. Its totient is φ = 7526400.

The previous prime is 28937269. The next prime is 28937287. The reversal of 28937280 is 8273982.

It is not an unprimeable number, because it can be changed into a prime (28937287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40930 + ... + 41630.

Almost surely, 2^28937280 is an apocalyptic number.

28937280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28937280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47073312).

28937280 is an abundant number, since it is smaller than the sum of its proper divisors (65209344).

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

28937280 is a wasteful number, since it uses less digits than its factorization.

28937280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28937280 is about 5379.3382492645. The cubic root of 28937280 is about 307.0100333771.

The spelling of 28937280 in words is "twenty-eight million, nine hundred thirty-seven thousand, two hundred eighty".