229749660 has 72 divisors (see below), whose sum is σ = 796469856. Its totient is φ = 52513920.

The previous prime is 229749659. The next prime is 229749661. The reversal of 229749660 is 66947922.

229749660 = T₁₇₇₇ + T₁₇₇₈ + ... + T₁₉₁₁.

It is an interprime number because it is at equal distance from previous prime (229749659) and next prime (229749661).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229749661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89911 + ... + 92430.

Almost surely, 2^229749660 is an apocalyptic number.

229749660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229749660 is an abundant number, since it is smaller than the sum of its proper divisors (566720196).

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

229749660 is a wasteful number, since it uses less digits than its factorization.

229749660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182363 (or 182358 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 229749660 is about 15157.4951756548. The cubic root of 229749660 is about 612.4701948568.

The spelling of 229749660 in words is "two hundred twenty-nine million, seven hundred forty-nine thousand, six hundred sixty".