28636630 has 64 divisors (see below), whose sum is σ = 59719680. Its totient is φ = 9788800.

The previous prime is 28636627. The next prime is 28636639. The reversal of 28636630 is 3663682.

28636630 = T₃₉ + T₄₀ + ... + T₅₅₅.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28636639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149835 + ... + 150025.

It is an arithmetic number, because the mean of its divisors is an integer number (933120).

Almost surely, 2^28636630 is an apocalyptic number.

28636630 is an abundant number, since it is smaller than the sum of its proper divisors (31083050).

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

28636630 is a wasteful number, since it uses less digits than its factorization.

28636630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 28636630 is about 5351.3203978084. The cubic root of 28636630 is about 305.9430811016.

The spelling of 28636630 in words is "twenty-eight million, six hundred thirty-six thousand, six hundred thirty".