28649624644 has 9 divisors (see below), whose sum is σ = 50137435551. Its totient is φ = 14324643060.

The previous prime is 28649624621. The next prime is 28649624659. The reversal of 28649624644 is 44642694682.

The square root of 28649624644 is 169262.

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 2 ways as a sum of consecutive naturals, for example, 296209 + ... + 380839.

Almost surely, 2^28649624644 is an apocalyptic number.

28649624644 is the 169262-nd square number.

It is an amenable number.

28649624644 is a deficient number, since it is larger than the sum of its proper divisors (21487810907).

28649624644 is an frugal number, since it uses more digits than its factorization.

28649624644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169266 (or 84633 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 55.

The spelling of 28649624644 in words is "twenty-eight billion, six hundred forty-nine million, six hundred twenty-four thousand, six hundred forty-four".