28857166240 has 192 divisors, whose sum is σ = 79949721600. Its totient is φ = 9838510080.

The previous prime is 28857166229. The next prime is 28857166241. The reversal of 28857166240 is 4266175882.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (28857166241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10480704 + ... + 10483456.

It is an arithmetic number, because the mean of its divisors is an integer number (416404800).

Almost surely, 2^28857166240 is an apocalyptic number.

28857166240 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 28857166240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39974860800).

28857166240 is an abundant number, since it is smaller than the sum of its proper divisors (51092555360).

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

28857166240 is a wasteful number, since it uses less digits than its factorization.

28857166240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980 (or 2958 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 28857166240 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred sixty-six thousand, two hundred forty".