229761720 has 96 divisors (see below), whose sum is σ = 779220000. Its totient is φ = 58603776.

The previous prime is 229761713. The next prime is 229761767. The reversal of 229761720 is 27167922.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5595 + ... + 22154.

It is an arithmetic number, because the mean of its divisors is an integer number (8116875).

Almost surely, 2^229761720 is an apocalyptic number.

229761720 is a gapful number since it is divisible by the number (20) 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 229761720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389610000).

229761720 is an abundant number, since it is smaller than the sum of its proper divisors (549458280).

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

229761720 is a wasteful number, since it uses less digits than its factorization.

229761720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27789 (or 27782 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 229761720 is about 15157.8929934210. The cubic root of 229761720 is about 612.4809112474.

The spelling of 229761720 in words is "two hundred twenty-nine million, seven hundred sixty-one thousand, seven hundred twenty".