28011732 has 36 divisors (see below), whose sum is σ = 76033440. Its totient is φ = 8003184.

The previous prime is 28011721. The next prime is 28011761. The reversal of 28011732 is 23711082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23232 + ... + 24407.

It is an arithmetic number, because the mean of its divisors is an integer number (2112040).

Almost surely, 2^28011732 is an apocalyptic number.

It is an amenable number.

28011732 is an abundant number, since it is smaller than the sum of its proper divisors (48021708).

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

28011732 is a wasteful number, since it uses less digits than its factorization.

28011732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47660 (or 47651 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 28011732 is about 5292.6110758302. The cubic root of 28011732 is about 303.7013022915.

The spelling of 28011732 in words is "twenty-eight million, eleven thousand, seven hundred thirty-two".