28744470 has 56 divisors (see below), whose sum is σ = 77594256. Its totient is φ = 7663248.

The previous prime is 28744459. The next prime is 28744487. The reversal of 28744470 is 7444782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5319 + ... + 9261.

Almost surely, 2^28744470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28744470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38797128).

28744470 is an abundant number, since it is smaller than the sum of its proper divisors (48849786).

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

28744470 is an equidigital number, since it uses as much as digits as its factorization.

28744470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 3953 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 28744470 is about 5361.3869474232. The cubic root of 28744470 is about 306.3266408214.

The spelling of 28744470 in words is "twenty-eight million, seven hundred forty-four thousand, four hundred seventy".