28433960 has 16 divisors (see below), whose sum is σ = 63976500. Its totient is φ = 11373568.

The previous prime is 28433953. The next prime is 28433963. The reversal of 28433960 is 6933482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 195364 = 5314^2 + 442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28433960.

It is not an unprimeable number, because it can be changed into a prime (28433963) 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 3 ways as a sum of consecutive naturals, for example, 355385 + ... + 355464.

Almost surely, 2^28433960 is an apocalyptic number.

28433960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28433960 is an abundant number, since it is smaller than the sum of its proper divisors (35542540).

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

28433960 is a wasteful number, since it uses less digits than its factorization.

28433960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710860 (or 710856 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28433960 is about 5332.3503260757. The cubic root of 28433960 is about 305.2196214483.

The spelling of 28433960 in words is "twenty-eight million, four hundred thirty-three thousand, nine hundred sixty".