28969972 has 24 divisors (see below), whose sum is σ = 56016576. Its totient is φ = 13039488.

The previous prime is 28969957. The next prime is 28969973. The reversal of 28969972 is 27996982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7698 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (2334024).

Almost surely, 2^28969972 is an apocalyptic number.

It is an amenable number.

28969972 is a deficient number, since it is larger than the sum of its proper divisors (27046604).

28969972 is a wasteful number, since it uses less digits than its factorization.

28969972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18567 (or 18565 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 28969972 is about 5382.3760552381. The cubic root of 28969972 is about 307.1256051089.

The spelling of 28969972 in words is "twenty-eight million, nine hundred sixty-nine thousand, nine hundred seventy-two".