28378594920 has 192 divisors, whose sum is σ = 93491625600. Its totient is φ = 6886763520.

The previous prime is 28378594903. The next prime is 28378594967. The reversal of 28378594920 is 2949587382.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1430026 + ... + 1449734.

It is an arithmetic number, because the mean of its divisors is an integer number (486935550).

Almost surely, 2^28378594920 is an apocalyptic number.

28378594920 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 28378594920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46745812800).

28378594920 is an abundant number, since it is smaller than the sum of its proper divisors (65113030680).

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

28378594920 is a wasteful number, since it uses less digits than its factorization.

28378594920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19820 (or 19803 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 28378594920 in words is "twenty-eight billion, three hundred seventy-eight million, five hundred ninety-four thousand, nine hundred twenty".