28455929700 has 144 divisors (see below), whose sum is σ = 90744233664. Its totient is φ = 6827212800.

The previous prime is 28455929681. The next prime is 28455929707. The reversal of 28455929700 is 792955482.

It is not an unprimeable number, because it can be changed into a prime (28455929707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275652 + ... + 364548.

Almost surely, 2^28455929700 is an apocalyptic number.

28455929700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28455929700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45372116832).

28455929700 is an abundant number, since it is smaller than the sum of its proper divisors (62288303964).

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

28455929700 is a wasteful number, since it uses less digits than its factorization.

28455929700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89022 (or 89015 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 28455929700 in words is "twenty-eight billion, four hundred fifty-five million, nine hundred twenty-nine thousand, seven hundred".