28735730 has 8 divisors (see below), whose sum is σ = 51724332. Its totient is φ = 11494288.

The previous prime is 28735709. The next prime is 28735747. The reversal of 28735730 is 3753782.

It can be written as a sum of positive squares in 2 ways, for example, as 28376929 + 358801 = 5327^2 + 599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436777 + ... + 1436796.

Almost surely, 2^28735730 is an apocalyptic number.

28735730 is a deficient number, since it is larger than the sum of its proper divisors (22988602).

28735730 is a wasteful number, since it uses less digits than its factorization.

28735730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873580.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28735730 is about 5360.5717978589. The cubic root of 28735730 is about 306.2955906027.

The spelling of 28735730 in words is "twenty-eight million, seven hundred thirty-five thousand, seven hundred thirty".