28147460 has 48 divisors (see below), whose sum is σ = 65197440. Its totient is φ = 10122240.

The previous prime is 28147451. The next prime is 28147481. The reversal of 28147460 is 6474182.

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, 20681 + ... + 21999.

It is an arithmetic number, because the mean of its divisors is an integer number (1358280).

Almost surely, 2^28147460 is an apocalyptic number.

28147460 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 28147460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32598720).

28147460 is an abundant number, since it is smaller than the sum of its proper divisors (37049980).

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

28147460 is a wasteful number, since it uses less digits than its factorization.

28147460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28147460 is about 5305.4179854183. The cubic root of 28147460 is about 304.1910300953.

The spelling of 28147460 in words is "twenty-eight million, one hundred forty-seven thousand, four hundred sixty".