229372640 has 48 divisors (see below), whose sum is σ = 619309152. Its totient is φ = 78641664.

The previous prime is 229372631. The next prime is 229372651. The reversal of 229372640 is 46273922.

It is a happy number.

It is a super-2 number, since 2×229372640² = 105223615961139200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 229372640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101279 + ... + 103518.

It is an arithmetic number, because the mean of its divisors is an integer number (12902274).

Almost surely, 2^229372640 is an apocalyptic number.

229372640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229372640 is an abundant number, since it is smaller than the sum of its proper divisors (389936512).

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

229372640 is a wasteful number, since it uses less digits than its factorization.

229372640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204819 (or 204811 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 229372640 is about 15145.0533178329. The cubic root of 229372640 is about 612.1349895176.

The spelling of 229372640 in words is "two hundred twenty-nine million, three hundred seventy-two thousand, six hundred forty".