28018630 has 8 divisors (see below), whose sum is σ = 50433552. Its totient is φ = 11207448.

The previous prime is 28018607. The next prime is 28018633. The reversal of 28018630 is 3681082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400922 + ... + 1400941.

It is an arithmetic number, because the mean of its divisors is an integer number (6304194).

Almost surely, 2^28018630 is an apocalyptic number.

28018630 is a deficient number, since it is larger than the sum of its proper divisors (22414922).

28018630 is a wasteful number, since it uses less digits than its factorization.

28018630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801870.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28018630 is about 5293.2626989410. The cubic root of 28018630 is about 303.7262294618.

The spelling of 28018630 in words is "twenty-eight million, eighteen thousand, six hundred thirty".