28711396 has 12 divisors (see below), whose sum is σ = 57422848. Its totient is φ = 12304872.

The previous prime is 28711393. The next prime is 28711399. The reversal of 28711396 is 69311782.

It is an interprime number because it is at equal distance from previous prime (28711393) and next prime (28711399).

28711396 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28711393) 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, 512676 + ... + 512731.

Almost surely, 2^28711396 is an apocalyptic number.

It is an amenable number.

28711396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28711396 is a wasteful number, since it uses less digits than its factorization.

28711396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025418 (or 1025416 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 28711396 is about 5358.3015965882. The cubic root of 28711396 is about 306.2091070763.

The spelling of 28711396 in words is "twenty-eight million, seven hundred eleven thousand, three hundred ninety-six".