28401773904 has 240 divisors, whose sum is σ = 94390208640. Its totient is φ = 8098859520.

The previous prime is 28401773887. The next prime is 28401773927. The reversal of 28401773904 is 40937710482.

It is a self number, because there is not a number n which added to its sum of digits gives 28401773904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25609702 + ... + 25610810.

It is an arithmetic number, because the mean of its divisors is an integer number (393292536).

Almost surely, 2^28401773904 is an apocalyptic number.

28401773904 is a gapful number since it is divisible by the number (24) 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 28401773904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47195104320).

28401773904 is an abundant number, since it is smaller than the sum of its proper divisors (65988434736).

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

28401773904 is a wasteful number, since it uses less digits than its factorization.

28401773904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 28401773904 in words is "twenty-eight billion, four hundred one million, seven hundred seventy-three thousand, nine hundred four".