28173630 has 16 divisors (see below), whose sum is σ = 67616784. Its totient is φ = 7512960.

The previous prime is 28173619. The next prime is 28173631. The reversal of 28173630 is 3637182.

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: 939121 = 28173630 / (2 + 8 + 1 + 7 + 3 + 6 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469531 + ... + 469590.

It is an arithmetic number, because the mean of its divisors is an integer number (4226049).

Almost surely, 2^28173630 is an apocalyptic number.

28173630 is an abundant number, since it is smaller than the sum of its proper divisors (39443154).

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

28173630 is a wasteful number, since it uses less digits than its factorization.

28173630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939131.

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

The square root of 28173630 is about 5307.8837590889. The cubic root of 28173630 is about 304.2852744001.

The spelling of 28173630 in words is "twenty-eight million, one hundred seventy-three thousand, six hundred thirty".