28501332 has 12 divisors (see below), whose sum is σ = 66503136. Its totient is φ = 9500440.

The previous prime is 28501327. The next prime is 28501337. The reversal of 28501332 is 23310582.

It is an interprime number because it is at equal distance from previous prime (28501327) and next prime (28501337).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28501337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187544 + ... + 1187567.

It is an arithmetic number, because the mean of its divisors is an integer number (5541928).

Almost surely, 2^28501332 is an apocalyptic number.

It is an amenable number.

28501332 is an abundant number, since it is smaller than the sum of its proper divisors (38001804).

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

28501332 is a wasteful number, since it uses less digits than its factorization.

28501332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375118 (or 2375116 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28501332 is about 5338.6638777881. The cubic root of 28501332 is about 305.4604958192.

The spelling of 28501332 in words is "twenty-eight million, five hundred one thousand, three hundred thirty-two".