28217148272 has 40 divisors (see below), whose sum is σ = 55731182976. Its totient is φ = 13835184896.

The previous prime is 28217148247. The next prime is 28217148331. The reversal of 28217148272 is 27284171282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863998 + ... + 1879074.

Almost surely, 2^28217148272 is an apocalyptic number.

It is an amenable number.

28217148272 is a deficient number, since it is larger than the sum of its proper divisors (27514034704).

28217148272 is a wasteful number, since it uses less digits than its factorization.

28217148272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17345 (or 17339 counting only the distinct ones).

The product of its digits is 200704, while the sum is 44.

The spelling of 28217148272 in words is "twenty-eight billion, two hundred seventeen million, one hundred forty-eight thousand, two hundred seventy-two".