28971952 has 10 divisors (see below), whose sum is σ = 56133188. Its totient is φ = 14485968.

The previous prime is 28971947. The next prime is 28971983. The reversal of 28971952 is 25917982.

It is a junction number, because it is equal to n+sod(n) for n = 28971899 and 28971908.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905358 + ... + 905389.

Almost surely, 2^28971952 is an apocalyptic number.

It is an amenable number.

28971952 is a deficient number, since it is larger than the sum of its proper divisors (27161236).

28971952 is a wasteful number, since it uses less digits than its factorization.

28971952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810755 (or 1810749 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 28971952 is about 5382.5599857317. The cubic root of 28971952 is about 307.1326019497.

The spelling of 28971952 in words is "twenty-eight million, nine hundred seventy-one thousand, nine hundred fifty-two".