28160378400 has 648 divisors, whose sum is σ = 117261088560. Its totient is φ = 5848550400.

The previous prime is 28160378383. The next prime is 28160378413. The reversal of 28160378400 is 487306182.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 14228611 + ... + 14230589.

It is an arithmetic number, because the mean of its divisors is an integer number (180958470).

Almost surely, 2^28160378400 is an apocalyptic number.

28160378400 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 28160378400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58630544280).

28160378400 is an abundant number, since it is smaller than the sum of its proper divisors (89100710160).

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

28160378400 is a wasteful number, since it uses less digits than its factorization.

28160378400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 28160378400 in words is "twenty-eight billion, one hundred sixty million, three hundred seventy-eight thousand, four hundred".