28347630 has 32 divisors (see below), whose sum is σ = 68666400. Its totient is φ = 7489152.

The previous prime is 28347623. The next prime is 28347637. The reversal of 28347630 is 3674382.

It is an interprime number because it is at equal distance from previous prime (28347623) and next prime (28347637).

It is a junction number, because it is equal to n+sod(n) for n = 28347591 and 28347600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347637) 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 15 ways as a sum of consecutive naturals, for example, 1065 + ... + 7604.

It is an arithmetic number, because the mean of its divisors is an integer number (2145825).

Almost surely, 2^28347630 is an apocalyptic number.

28347630 is an abundant number, since it is smaller than the sum of its proper divisors (40318770).

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

28347630 is a wasteful number, since it uses less digits than its factorization.

28347630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8788.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 28347630 is about 5324.2492428511. The cubic root of 28347630 is about 304.9104099492.

The spelling of 28347630 in words is "twenty-eight million, three hundred forty-seven thousand, six hundred thirty".