28744460 has 12 divisors (see below), whose sum is σ = 60363408. Its totient is φ = 11497776.

The previous prime is 28744459. The next prime is 28744487. The reversal of 28744460 is 6444782.

It is a self number, because there is not a number n which added to its sum of digits gives 28744460.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 718592 + ... + 718631.

It is an arithmetic number, because the mean of its divisors is an integer number (5030284).

Almost surely, 2^28744460 is an apocalyptic number.

28744460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28744460 is an abundant number, since it is smaller than the sum of its proper divisors (31618948).

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

28744460 is a wasteful number, since it uses less digits than its factorization.

28744460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437232 (or 1437230 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 28744460 is about 5361.3860148286. The cubic root of 28744460 is about 306.3266052984.

The spelling of 28744460 in words is "twenty-eight million, seven hundred forty-four thousand, four hundred sixty".