28997356 has 6 divisors (see below), whose sum is σ = 50745380. Its totient is φ = 14498676.

The previous prime is 28997347. The next prime is 28997377. The reversal of 28997356 is 65379982.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3624666 + ... + 3624673.

Almost surely, 2^28997356 is an apocalyptic number.

It is an amenable number.

28997356 is a deficient number, since it is larger than the sum of its proper divisors (21748024).

28997356 is a wasteful number, since it uses less digits than its factorization.

28997356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249343 (or 7249341 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 28997356 is about 5384.9193123017. The cubic root of 28997356 is about 307.2223452668. Note that the first 3 decimals are identical.

The spelling of 28997356 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred fifty-six".