28247861040 has 480 divisors, whose sum is σ = 105036134400. Its totient is φ = 6276867072.

The previous prime is 28247861009. The next prime is 28247861069. The reversal of 28247861040 is 4016874282.

It is a Cunningham number, because it is equal to 168071²-1.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28247860983 and 28247861001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 189582886 + ... + 189583034.

It is an arithmetic number, because the mean of its divisors is an integer number (218825280).

Almost surely, 2^28247861040 is an apocalyptic number.

28247861040 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 28247861040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52518067200).

28247861040 is an abundant number, since it is smaller than the sum of its proper divisors (76788273360).

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

28247861040 is an equidigital number, since it uses as much as digits as its factorization.

28247861040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 28247861040 in words is "twenty-eight billion, two hundred forty-seven million, eight hundred sixty-one thousand, forty".