28747400 has 96 divisors (see below), whose sum is σ = 74325600. Its totient is φ = 10252800.

The previous prime is 28747387. The next prime is 28747417. The reversal of 28747400 is 474782.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160511 + ... + 160689.

It is an arithmetic number, because the mean of its divisors is an integer number (774225).

Almost surely, 2^28747400 is an apocalyptic number.

28747400 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 28747400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37162800).

28747400 is an abundant number, since it is smaller than the sum of its proper divisors (45578200).

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

28747400 is a wasteful number, since it uses less digits than its factorization.

28747400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28747400 is about 5361.6601906499. The cubic root of 28747400 is about 306.3370486965.

The spelling of 28747400 in words is "twenty-eight million, seven hundred forty-seven thousand, four hundred".