28421152 has 12 divisors (see below), whose sum is σ = 55954206. Its totient is φ = 14210560.

The previous prime is 28421149. The next prime is 28421167. The reversal of 28421152 is 25112482.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 76176 = 5324^2 + 276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444049 + ... + 444112.

Almost surely, 2^28421152 is an apocalyptic number.

It is an amenable number.

28421152 is a deficient number, since it is larger than the sum of its proper divisors (27533054).

28421152 is an equidigital number, since it uses as much as digits as its factorization.

28421152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888171 (or 888163 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 28421152 is about 5331.1492194460. The cubic root of 28421152 is about 305.1737861158.

The spelling of 28421152 in words is "twenty-eight million, four hundred twenty-one thousand, one hundred fifty-two".