28773417840 has 80 divisors (see below), whose sum is σ = 89376720000. Its totient is φ = 7657502976.

The previous prime is 28773417833. The next prime is 28773417851. The reversal of 28773417840 is 4871437782.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370 + ... + 239889.

It is an arithmetic number, because the mean of its divisors is an integer number (1117209000).

Almost surely, 2^28773417840 is an apocalyptic number.

28773417840 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 28773417840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44688360000).

28773417840 is an abundant number, since it is smaller than the sum of its proper divisors (60603302160).

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

28773417840 is a wasteful number, since it uses less digits than its factorization.

28773417840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240774 (or 240768 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 51.

The spelling of 28773417840 in words is "twenty-eight billion, seven hundred seventy-three million, four hundred seventeen thousand, eight hundred forty".