28361730 has 16 divisors (see below), whose sum is σ = 68068224. Its totient is φ = 7563120.

The previous prime is 28361717. The next prime is 28361819. The reversal of 28361730 is 3716382.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 945391 = 28361730 / (2 + 8 + 3 + 6 + 1 + 7 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472666 + ... + 472725.

It is an arithmetic number, because the mean of its divisors is an integer number (4254264).

Almost surely, 2^28361730 is an apocalyptic number.

28361730 is an abundant number, since it is smaller than the sum of its proper divisors (39706494).

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

28361730 is a wasteful number, since it uses less digits than its factorization.

28361730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945401.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 28361730 is about 5325.5732085852. The cubic root of 28361730 is about 304.9609553172.

The spelling of 28361730 in words is "twenty-eight million, three hundred sixty-one thousand, seven hundred thirty".