2028776400 has 720 divisors, whose sum is σ = 8635161600. Its totient is φ = 440294400.

The previous prime is 2028776383. The next prime is 2028776411. The reversal of 2028776400 is 46778202.

2028776400 is a `hidden beast` number, since 2 + 0 + 2 + 8 + 7 + 7 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 38278774 + ... + 38278826.

It is an arithmetic number, because the mean of its divisors is an integer number (11993280).

Almost surely, 2^2028776400 is an apocalyptic number.

2028776400 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 2028776400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4317580800).

2028776400 is an abundant number, since it is smaller than the sum of its proper divisors (6606385200).

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

2028776400 is a wasteful number, since it uses less digits than its factorization.

2028776400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 2028776400 is about 45041.9404555354. The cubic root of 2028776400 is about 1265.9349636784.

The spelling of 2028776400 in words is "two billion, twenty-eight million, seven hundred seventy-six thousand, four hundred".