28434852 has 18 divisors (see below), whose sum is σ = 71877078. Its totient is φ = 9478272.

The previous prime is 28434851. The next prime is 28434893. The reversal of 28434852 is 25843482.

It can be written as a sum of positive squares in only one way, i.e., 26378496 + 2056356 = 5136^2 + 1434^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 789857 = 28434852 / (2 + 8 + 4 + 3 + 4 + 8 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (28434851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 394893 + ... + 394964.

It is an arithmetic number, because the mean of its divisors is an integer number (3993171).

Almost surely, 2^28434852 is an apocalyptic number.

It is an amenable number.

28434852 is an abundant number, since it is smaller than the sum of its proper divisors (43442226).

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

28434852 is a wasteful number, since it uses less digits than its factorization.

28434852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789867 (or 789862 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 28434852 is about 5332.4339658359. The cubic root of 28434852 is about 305.2228130902. Note that the first 3 decimals are identical.

The spelling of 28434852 in words is "twenty-eight million, four hundred thirty-four thousand, eight hundred fifty-two".