28007448 has 64 divisors (see below), whose sum is σ = 81903360. Its totient is φ = 7814016.

The previous prime is 28007431. The next prime is 28007453. The reversal of 28007448 is 84470082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5286 + ... + 9162.

It is an arithmetic number, because the mean of its divisors is an integer number (1279740).

Almost surely, 2^28007448 is an apocalyptic number.

28007448 is a gapful number since it is divisible by the number (28) 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 28007448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40951680).

28007448 is an abundant number, since it is smaller than the sum of its proper divisors (53895912).

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

28007448 is a wasteful number, since it uses less digits than its factorization.

28007448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28007448 is about 5292.2063451835. The cubic root of 28007448 is about 303.6858192228.

The spelling of 28007448 in words is "twenty-eight million, seven thousand, four hundred forty-eight".