229147720 has 32 divisors (see below), whose sum is σ = 524040120. Its totient is φ = 90155520.

The previous prime is 229147693. The next prime is 229147727. The reversal of 229147720 is 27741922.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 138250564 + 90897156 = 11758^2 + 9534^2 .

It is not an unprimeable number, because it can be changed into a prime (229147727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44517 + ... + 49396.

Almost surely, 2^229147720 is an apocalyptic number.

229147720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229147720 is an abundant number, since it is smaller than the sum of its proper divisors (294892400).

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

229147720 is a wasteful number, since it uses less digits than its factorization.

229147720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93985 (or 93981 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 229147720 is about 15137.6259697484. The cubic root of 229147720 is about 611.9348400588.

The spelling of 229147720 in words is "two hundred twenty-nine million, one hundred forty-seven thousand, seven hundred twenty".