28431355456 has 63 divisors (see below), whose sum is σ = 65651453787. Its totient is φ = 12180819840.

The previous prime is 28431355439. The next prime is 28431355483. The reversal of 28431355456 is 65455313482.

It is a happy number.

The square root of 28431355456 is 168616.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9440991 + ... + 9444001.

Almost surely, 2^28431355456 is an apocalyptic number.

28431355456 is the 168616-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28431355456

28431355456 is an abundant number, since it is smaller than the sum of its proper divisors (37220098331).

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

28431355456 is an frugal number, since it uses more digits than its factorization.

28431355456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048 (or 3020 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 46.

The spelling of 28431355456 in words is "twenty-eight billion, four hundred thirty-one million, three hundred fifty-five thousand, four hundred fifty-six".