228508632 has 96 divisors (see below), whose sum is σ = 698490000. Its totient is φ = 66850560.

The previous prime is 228508619. The next prime is 228508639. The reversal of 228508632 is 236805822.

It is a super-2 number, since 2×228508632² = 104432389797022848, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228508639) 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, 17994 + ... + 27942.

Almost surely, 2^228508632 is an apocalyptic number.

228508632 is a gapful number since it is divisible by the number (22) 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 228508632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349245000).

228508632 is an abundant number, since it is smaller than the sum of its proper divisors (469981368).

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

228508632 is a wasteful number, since it uses less digits than its factorization.

228508632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001 (or 9994 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 228508632 is about 15116.5019763171. The cubic root of 228508632 is about 611.3654193829.

The spelling of 228508632 in words is "two hundred twenty-eight million, five hundred eight thousand, six hundred thirty-two".