299664 has 30 divisors (see below), whose sum is σ = 839046. Its totient is φ = 99840.

The previous prime is 299653. The next prime is 299671. The reversal of 299664 is 466992.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 57600 = 492^2 + 240^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 13.

It is an unprimeable number.

299664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897 + ... + 1184.

2²⁹⁹⁶⁶⁴ is an apocalyptic number.

299664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

299664 is an abundant number, since it is smaller than the sum of its proper divisors (539382).

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

299664 is a wasteful number, since it uses less digits than its factorization.

299664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2086 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 299664 is about 547.4157469419. The cubic root of 299664 is about 66.9182935085.

The spelling of 299664 in words is "two hundred ninety-nine thousand, six hundred sixty-four".