28993772 has 24 divisors (see below), whose sum is σ = 56553840. Its totient is φ = 12925440.

The previous prime is 28993759. The next prime is 28993787. The reversal of 28993772 is 27739982.

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, 9929 + ... + 12512.

It is an arithmetic number, because the mean of its divisors is an integer number (2356410).

Almost surely, 2^28993772 is an apocalyptic number.

It is an amenable number.

28993772 is a deficient number, since it is larger than the sum of its proper divisors (27560068).

28993772 is a wasteful number, since it uses less digits than its factorization.

28993772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22481 (or 22479 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 28993772 is about 5384.5865208018. The cubic root of 28993772 is about 307.2096874432.

The spelling of 28993772 in words is "twenty-eight million, nine hundred ninety-three thousand, seven hundred seventy-two".