227981628 has 216 divisors, whose sum is σ = 734059872. Its totient is φ = 60466176.

The previous prime is 227981603. The next prime is 227981629. The reversal of 227981628 is 826189722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227981629) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3123000 + ... + 3123072.

Almost surely, 2^227981628 is an apocalyptic number.

227981628 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 227981628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367029936).

227981628 is an abundant number, since it is smaller than the sum of its proper divisors (506078244).

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

227981628 is an equidigital number, since it uses as much as digits as its factorization.

227981628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 102 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 227981628 is about 15099.0605005742. The cubic root of 227981628 is about 610.8950651204.

The spelling of 227981628 in words is "two hundred twenty-seven million, nine hundred eighty-one thousand, six hundred twenty-eight".