28743550 has 36 divisors (see below), whose sum is σ = 58777488. Its totient is φ = 10450000.

The previous prime is 28743521. The next prime is 28743571. The reversal of 28743550 is 5534782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3675 + ... + 8425.

It is an arithmetic number, because the mean of its divisors is an integer number (1632708).

Almost surely, 2^28743550 is an apocalyptic number.

28743550 is an abundant number, since it is smaller than the sum of its proper divisors (30033938).

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

28743550 is a wasteful number, since it uses less digits than its factorization.

28743550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28743550 is about 5361.3011480423. The cubic root of 28743550 is about 306.3233726737.

The spelling of 28743550 in words is "twenty-eight million, seven hundred forty-three thousand, five hundred fifty".