28731747460 has 36 divisors (see below), whose sum is σ = 65334981348. Its totient is φ = 10608643968.

The previous prime is 28731747431. The next prime is 28731747461. The reversal of 28731747460 is 6474713782.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11137847296 + 17593900164 = 105536^2 + 132642^2 .

It is not an unprimeable number, because it can be changed into a prime (28731747461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4246879 + ... + 4253638.

It is an arithmetic number, because the mean of its divisors is an integer number (1814860593).

Almost surely, 2^28731747460 is an apocalyptic number.

28731747460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28731747460 is an abundant number, since it is smaller than the sum of its proper divisors (36603233888).

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

28731747460 is a wasteful number, since it uses less digits than its factorization.

28731747460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500552 (or 8500537 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 28731747460 in words is "twenty-eight billion, seven hundred thirty-one million, seven hundred forty-seven thousand, four hundred sixty".