Search a number
2227788 = 2232193257
BaseRepresentation
bin1000011111111001001100
311012011221200
420133321030
51032242123
6115425500
724636003
oct10377114
94164850
102227788
111291852
128b5290
13600024
1441dc3a
152e0143
hex21fe4c

2227788 has 36 divisors (see below), whose sum is σ = 5929560. Its totient is φ = 703296.

The previous prime is 2227777. The next prime is 2227789. The reversal of 2227788 is 8877222.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2227789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 945 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (164710).

22227788 is an apocalyptic number.

It is an amenable number.

2227788 is an abundant number, since it is smaller than the sum of its proper divisors (3701772).

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

2227788 is a wasteful number, since it uses less digits than its factorization.

2227788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3281 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 2227788 is about 1492.5776361717. The cubic root of 2227788 is about 130.6044436262.

The spelling of 2227788 in words is "two million, two hundred twenty-seven thousand, seven hundred eighty-eight".