28965934420 has 12 divisors (see below), whose sum is σ = 60828462324. Its totient is φ = 11586373760.

The previous prime is 28965934409. The next prime is 28965934421. The reversal of 28965934420 is 2443956982.

It can be written as a sum of positive squares in 2 ways, for example, as 9485591236 + 19480343184 = 97394^2 + 139572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965934421) 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, 724148341 + ... + 724148380.

It is an arithmetic number, because the mean of its divisors is an integer number (5069038527).

Almost surely, 2^28965934420 is an apocalyptic number.

28965934420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28965934420 is an abundant number, since it is smaller than the sum of its proper divisors (31862527904).

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

28965934420 is a wasteful number, since it uses less digits than its factorization.

28965934420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448296730 (or 1448296728 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 28965934420 in words is "twenty-eight billion, nine hundred sixty-five million, nine hundred thirty-four thousand, four hundred twenty".