28711460 has 12 divisors (see below), whose sum is σ = 60294108. Its totient is φ = 11484576.

The previous prime is 28711433. The next prime is 28711469. The reversal of 28711460 is 6411782.

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 21603904 = 2666^2 + 4648^2 .

It is not an unprimeable number, because it can be changed into a prime (28711469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717767 + ... + 717806.

It is an arithmetic number, because the mean of its divisors is an integer number (5024509).

Almost surely, 2^28711460 is an apocalyptic number.

28711460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28711460 is an abundant number, since it is smaller than the sum of its proper divisors (31582648).

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

28711460 is a wasteful number, since it uses less digits than its factorization.

28711460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435582 (or 1435580 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28711460 is about 5358.3075686265. The cubic root of 28711460 is about 306.2093345977.

The spelling of 28711460 in words is "twenty-eight million, seven hundred eleven thousand, four hundred sixty".