28418521630 has 16 divisors (see below), whose sum is σ = 51492105504. Its totient is φ = 11292127200.

The previous prime is 28418521591. The next prime is 28418521639. The reversal of 28418521630 is 3612581482.

It is a super-2 number, since 2×28418521630² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418521639) 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, 9408597 + ... + 9411616.

It is an arithmetic number, because the mean of its divisors is an integer number (3218256594).

Almost surely, 2^28418521630 is an apocalyptic number.

28418521630 is a deficient number, since it is larger than the sum of its proper divisors (23073583874).

28418521630 is a wasteful number, since it uses less digits than its factorization.

28418521630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18820371.

The product of its (nonzero) digits is 92160, while the sum is 40.

It can be divided in two parts, 2841852 and 1630, that added together give a palindrome (2843482).

The spelling of 28418521630 in words is "twenty-eight billion, four hundred eighteen million, five hundred twenty-one thousand, six hundred thirty".