28903472 has 20 divisors (see below), whose sum is σ = 60308640. Its totient is φ = 13339968.

The previous prime is 28903471. The next prime is 28903481. The reversal of 28903472 is 27430982.

It is not an unprimeable number, because it can be changed into a prime (28903471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69272 + ... + 69687.

It is an arithmetic number, because the mean of its divisors is an integer number (3015432).

Almost surely, 2^28903472 is an apocalyptic number.

It is an amenable number.

28903472 is an abundant number, since it is smaller than the sum of its proper divisors (31405168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28903472 is a wasteful number, since it uses less digits than its factorization.

28903472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138980 (or 138974 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28903472 is about 5376.1949369419. The cubic root of 28903472 is about 306.8904248078.

The spelling of 28903472 in words is "twenty-eight million, nine hundred three thousand, four hundred seventy-two".