2278563840 has 336 divisors, whose sum is σ = 9037124928. Its totient is φ = 520224768.

The previous prime is 2278563817. The next prime is 2278563841. The reversal of 2278563840 is 483658722.

2278563840 is a `hidden beast` number, since 2 + 2 + 7 + 8 + 5 + 638 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2278563841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2580039 + ... + 2580921.

Almost surely, 2^2278563840 is an apocalyptic number.

2278563840 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 2278563840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4518562464).

2278563840 is an abundant number, since it is smaller than the sum of its proper divisors (6758561088).

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

2278563840 is an equidigital number, since it uses as much as digits as its factorization.

2278563840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 2278563840 is about 47734.3046456110. The cubic root of 2278563840 is about 1315.8924657223.

The spelling of 2278563840 in words is "two billion, two hundred seventy-eight million, five hundred sixty-three thousand, eight hundred forty".