227638516 has 54 divisors (see below), whose sum is σ = 480285078. Its totient is φ = 94127040.

The previous prime is 227638513. The next prime is 227638529. The reversal of 227638516 is 615836722.

It can be written as a sum of positive squares in 3 ways, for example, as 33593616 + 194044900 = 5796^2 + 13930^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227638511) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 164146 + ... + 165526.

Almost surely, 2^227638516 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 227638516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240142539).

227638516 is an abundant number, since it is smaller than the sum of its proper divisors (252646562).

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

227638516 is a wasteful number, since it uses less digits than its factorization.

227638516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1419 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 227638516 is about 15087.6941909624. The cubic root of 227638516 is about 610.5884458701.

The spelling of 227638516 in words is "two hundred twenty-seven million, six hundred thirty-eight thousand, five hundred sixteen".