28211896 has 32 divisors (see below), whose sum is σ = 55044000. Its totient is φ = 13539456.

The previous prime is 28211893. The next prime is 28211923. The reversal of 28211896 is 69811282.

It is a super-2 number, since 2×28211896² = 1591822151829632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28211893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64045 + ... + 64483.

It is an arithmetic number, because the mean of its divisors is an integer number (1720125).

Almost surely, 2^28211896 is an apocalyptic number.

It is an amenable number.

28211896 is a deficient number, since it is larger than the sum of its proper divisors (26832104).

28211896 is a wasteful number, since it uses less digits than its factorization.

28211896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 747 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 28211896 is about 5311.4871740408. The cubic root of 28211896 is about 304.4229742359.

The spelling of 28211896 in words is "twenty-eight million, two hundred eleven thousand, eight hundred ninety-six".