28691016 has 16 divisors (see below), whose sum is σ = 71727600. Its totient is φ = 9563664.

The previous prime is 28690997. The next prime is 28691017. The reversal of 28691016 is 61019682.

It is a super-2 number, since 2×28691016² = 1646348798224512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28691017) 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, 597706 + ... + 597753.

It is an arithmetic number, because the mean of its divisors is an integer number (4482975).

Almost surely, 2^28691016 is an apocalyptic number.

It is an amenable number.

28691016 is an abundant number, since it is smaller than the sum of its proper divisors (43036584).

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

28691016 is a wasteful number, since it uses less digits than its factorization.

28691016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195468 (or 1195464 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 28691016 is about 5356.3995370024. The cubic root of 28691016 is about 306.1366385376.

The spelling of 28691016 in words is "twenty-eight million, six hundred ninety-one thousand, sixteen".