28435572 has 36 divisors (see below), whose sum is σ = 78414336. Its totient is φ = 8616720.

The previous prime is 28435549. The next prime is 28435579. The reversal of 28435572 is 27553482.

28435572 is a `hidden beast` number, since 2 + 84 + 3 + 5 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28435579) 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 11 ways as a sum of consecutive naturals, for example, 35508 + ... + 36299.

It is an arithmetic number, because the mean of its divisors is an integer number (2178176).

Almost surely, 2^28435572 is an apocalyptic number.

28435572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28435572 is an abundant number, since it is smaller than the sum of its proper divisors (49978764).

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

28435572 is a wasteful number, since it uses less digits than its factorization.

28435572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71828 (or 71823 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 28435572 is about 5332.5014767930. The cubic root of 28435572 is about 305.2253892547.

It can be divided in two parts, 28 and 435572, that added together give a square (435600 = 660²).

The spelling of 28435572 in words is "twenty-eight million, four hundred thirty-five thousand, five hundred seventy-two".