28731457287460 has 24 divisors (see below), whose sum is σ = 60337295040960. Its totient is φ = 11492347726944.

The previous prime is 28731457287457. The next prime is 28731457287551. The reversal of 28731457287460 is 6478275413782.

It is a happy number.

It is a super-2 number, since 2×28731457287460² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28731457287392 and 28731457287401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13695840 + ... + 15653719.

It is an arithmetic number, because the mean of its divisors is an integer number (2514053960040).

Almost surely, 2^{28731457287460} is an apocalyptic number.

28731457287460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28731457287460 is an abundant number, since it is smaller than the sum of its proper divisors (31605837753500).

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

28731457287460 is a wasteful number, since it uses less digits than its factorization.

28731457287460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29398515 (or 29398513 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 28731457287460 in words is "twenty-eight trillion, seven hundred thirty-one billion, four hundred fifty-seven million, two hundred eighty-seven thousand, four hundred sixty".