28730132 has 12 divisors (see below), whose sum is σ = 50339520. Its totient is φ = 14347416.

The previous prime is 28730131. The next prime is 28730161. The reversal of 28730132 is 23103782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28730131) 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, 332 + ... + 7587.

It is an arithmetic number, because the mean of its divisors is an integer number (4194960).

Almost surely, 2^28730132 is an apocalyptic number.

It is an amenable number.

28730132 is a deficient number, since it is larger than the sum of its proper divisors (21609388).

28730132 is a wasteful number, since it uses less digits than its factorization.

28730132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830 (or 8828 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28730132 is about 5360.0496266359. The cubic root of 28730132 is about 306.2756995232.

The spelling of 28730132 in words is "twenty-eight million, seven hundred thirty thousand, one hundred thirty-two".