28941312 has 44 divisors (see below), whose sum is σ = 77147336. Its totient is φ = 9646080.

The previous prime is 28941307. The next prime is 28941317. The reversal of 28941312 is 21314982.

It is an interprime number because it is at equal distance from previous prime (28941307) and next prime (28941317).

It is a self number, because there is not a number n which added to its sum of digits gives 28941312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28941317) 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, 1639 + ... + 7782.

Almost surely, 2^28941312 is an apocalyptic number.

It is an amenable number.

28941312 is an abundant number, since it is smaller than the sum of its proper divisors (48206024).

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

28941312 is an equidigital number, since it uses as much as digits as its factorization.

28941312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9444 (or 9426 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 28941312 is about 5379.7130034975. The cubic root of 28941312 is about 307.0242918811.

The spelling of 28941312 in words is "twenty-eight million, nine hundred forty-one thousand, three hundred twelve".