28725772 has 6 divisors (see below), whose sum is σ = 50270108. Its totient is φ = 14362884.

The previous prime is 28725761. The next prime is 28725779. The reversal of 28725772 is 27752782.

It is not an unprimeable number, because it can be changed into a prime (28725779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590718 + ... + 3590725.

Almost surely, 2^28725772 is an apocalyptic number.

It is an amenable number.

28725772 is a deficient number, since it is larger than the sum of its proper divisors (21544336).

28725772 is a wasteful number, since it uses less digits than its factorization.

28725772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7181447 (or 7181445 counting only the distinct ones).

The product of its digits is 109760, while the sum is 40.

The square root of 28725772 is about 5359.6428985521. The cubic root of 28725772 is about 306.2602055741.

The spelling of 28725772 in words is "twenty-eight million, seven hundred twenty-five thousand, seven hundred seventy-two".