28740450 has 48 divisors (see below), whose sum is σ = 73745280. Its totient is φ = 7398720.

The previous prime is 28740433. The next prime is 28740451. The reversal of 28740450 is 5404782.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28740451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1047 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (1536360).

Almost surely, 2^28740450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28740450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36872640).

28740450 is an abundant number, since it is smaller than the sum of its proper divisors (45004830).

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

28740450 is a wasteful number, since it uses less digits than its factorization.

28740450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6651 (or 6646 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28740450 is about 5361.0120313239. The cubic root of 28740450 is about 306.3123599237.

The spelling of 28740450 in words is "twenty-eight million, seven hundred forty thousand, four hundred fifty".