28691324 has 12 divisors (see below), whose sum is σ = 51941400. Its totient is φ = 13850928.

The previous prime is 28691323. The next prime is 28691329. The reversal of 28691324 is 42319682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28691321) 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, 123554 + ... + 123785.

It is an arithmetic number, because the mean of its divisors is an integer number (4328450).

Almost surely, 2^28691324 is an apocalyptic number.

It is an amenable number.

28691324 is a deficient number, since it is larger than the sum of its proper divisors (23250076).

28691324 is a wasteful number, since it uses less digits than its factorization.

28691324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247372 (or 247370 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 28691324 is about 5356.4282875812. The cubic root of 28691324 is about 306.1377339995.

The spelling of 28691324 in words is "twenty-eight million, six hundred ninety-one thousand, three hundred twenty-four".