28984621700 has 18 divisors (see below), whose sum is σ = 62896629306. Its totient is φ = 11593848640.

The previous prime is 28984621693. The next prime is 28984621709. The reversal of 28984621700 is 712648982.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2963060356 + 26021561344 = 54434^2 + 161312^2 .

It is a super-2 number, since 2×28984621700² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28984621709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144923009 + ... + 144923208.

Almost surely, 2^28984621700 is an apocalyptic number.

28984621700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28984621700 is an abundant number, since it is smaller than the sum of its proper divisors (33912007606).

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

28984621700 is a wasteful number, since it uses less digits than its factorization.

28984621700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289846231 (or 289846224 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 28984621700 in words is "twenty-eight billion, nine hundred eighty-four million, six hundred twenty-one thousand, seven hundred".