2287421928 has 96 divisors (see below), whose sum is σ = 6767055360. Its totient is φ = 692259840.

The previous prime is 2287421887. The next prime is 2287421933. The reversal of 2287421928 is 8291247822.

It is a happy number.

It is a Cunningham number, because it is equal to 47827²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 859576 + ... + 862232.

It is an arithmetic number, because the mean of its divisors is an integer number (70490160).

Almost surely, 2^2287421928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2287421928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3383527680).

2287421928 is an abundant number, since it is smaller than the sum of its proper divisors (4479633432).

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

2287421928 is a wasteful number, since it uses less digits than its factorization.

2287421928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767 (or 3760 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 2287421928 is about 47826.9999895457. Note that the first 4 decimals coincide. The cubic root of 2287421928 is about 1317.5954710236.

The spelling of 2287421928 in words is "two billion, two hundred eighty-seven million, four hundred twenty-one thousand, nine hundred twenty-eight".