28828665400 has 24 divisors (see below), whose sum is σ = 67026647520. Its totient is φ = 11531466080.

The previous prime is 28828665389. The next prime is 28828665457. The reversal of 28828665400 is 456682882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72071464 + ... + 72071863.

It is an arithmetic number, because the mean of its divisors is an integer number (2792776980).

Almost surely, 2^28828665400 is an apocalyptic number.

28828665400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28828665400 is an abundant number, since it is smaller than the sum of its proper divisors (38197982120).

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

28828665400 is a wasteful number, since it uses less digits than its factorization.

28828665400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144143343 (or 144143334 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 28828665400 in words is "twenty-eight billion, eight hundred twenty-eight million, six hundred sixty-five thousand, four hundred".