28903632 has 40 divisors (see below), whose sum is σ = 74861280. Its totient is φ = 9609600.

The previous prime is 28903631. The next prime is 28903657. The reversal of 28903632 is 23630982.

It is a junction number, because it is equal to n+sod(n) for n = 28903593 and 28903602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28903631) 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, 33219 + ... + 34077.

It is an arithmetic number, because the mean of its divisors is an integer number (1871532).

Almost surely, 2^28903632 is an apocalyptic number.

It is an amenable number.

28903632 is an abundant number, since it is smaller than the sum of its proper divisors (45957648).

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

28903632 is a wasteful number, since it uses less digits than its factorization.

28903632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 28903632 is about 5376.2098173341. The cubic root of 28903632 is about 306.8909910878.

The spelling of 28903632 in words is "twenty-eight million, nine hundred three thousand, six hundred thirty-two".