228631648 has 72 divisors (see below), whose sum is σ = 527877000. Its totient is φ = 97187328.

The previous prime is 228631643. The next prime is 228631687. The reversal of 228631648 is 846136822.

It is a self number, because there is not a number n which added to its sum of digits gives 228631648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228631643) 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, 217428 + ... + 218476.

It is an arithmetic number, because the mean of its divisors is an integer number (7331625).

Almost surely, 2^228631648 is an apocalyptic number.

228631648 is a gapful number since it is divisible by the number (28) 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 228631648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263938500).

228631648 is an abundant number, since it is smaller than the sum of its proper divisors (299245352).

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

228631648 is a wasteful number, since it uses less digits than its factorization.

228631648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1197 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 228631648 is about 15120.5703596128. The cubic root of 228631648 is about 611.4751077798.

The spelling of 228631648 in words is "two hundred twenty-eight million, six hundred thirty-one thousand, six hundred forty-eight".