28211152 has 20 divisors (see below), whose sum is σ = 54807876. Its totient is φ = 14067200.

The previous prime is 28211149. The next prime is 28211153. The reversal of 28211152 is 25111282.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 5400976 = 4776^2 + 2324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28211153) 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, 4218 + ... + 8614.

Almost surely, 2^28211152 is an apocalyptic number.

It is an amenable number.

28211152 is a deficient number, since it is larger than the sum of its proper divisors (26596724).

28211152 is a wasteful number, since it uses less digits than its factorization.

28211152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806 (or 4800 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 28211152 is about 5311.4171366971. The cubic root of 28211152 is about 304.4202981463.

The spelling of 28211152 in words is "twenty-eight million, two hundred eleven thousand, one hundred fifty-two".