28433750 has 60 divisors (see below), whose sum is σ = 57009876. Its totient is φ = 10626000.

The previous prime is 28433749. The next prime is 28433791. The reversal of 28433750 is 5733482.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 661229 + ... + 661271.

Almost surely, 2^28433750 is an apocalyptic number.

28433750 is an abundant number, since it is smaller than the sum of its proper divisors (28576126).

28433750 is an equidigital number, since it uses as much as digits as its factorization.

28433750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28433750 is about 5332.3306349100. The cubic root of 28433750 is about 305.2188700431.

The spelling of 28433750 in words is "twenty-eight million, four hundred thirty-three thousand, seven hundred fifty".