28383730 has 8 divisors (see below), whose sum is σ = 51090732. Its totient is φ = 11353488.

The previous prime is 28383703. The next prime is 28383731. The reversal of 28383730 is 3738382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25190361 + 3193369 = 5019^2 + 1787^2 .

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

It is a super-2 number, since 2×28383730² = 1611272257425800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28383731) 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, 1419177 + ... + 1419196.

Almost surely, 2^28383730 is an apocalyptic number.

28383730 is a deficient number, since it is larger than the sum of its proper divisors (22707002).

28383730 is a wasteful number, since it uses less digits than its factorization.

28383730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838380.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 28383730 is about 5327.6383135494. The cubic root of 28383730 is about 305.0397869802.

The spelling of 28383730 in words is "twenty-eight million, three hundred eighty-three thousand, seven hundred thirty".