28903936 has 20 divisors (see below), whose sum is σ = 57752442. Its totient is φ = 14451712.

The previous prime is 28903933. The next prime is 28903949. The reversal of 28903936 is 63930982.

It can be written as a sum of positive squares in only one way, i.e., 23814400 + 5089536 = 4880^2 + 2256^2 .

It is not an unprimeable number, because it can be changed into a prime (28903933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27715 + ... + 28738.

Almost surely, 2^28903936 is an apocalyptic number.

It is an amenable number.

28903936 is a deficient number, since it is larger than the sum of its proper divisors (28848506).

28903936 is an frugal number, since it uses more digits than its factorization.

28903936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56471 (or 56455 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 28903936 is about 5376.2380899659. The cubic root of 28903936 is about 306.8920670141.

The spelling of 28903936 in words is "twenty-eight million, nine hundred three thousand, nine hundred thirty-six".