164223240 has 32 divisors (see below), whose sum is σ = 492670080. Its totient is φ = 43792832.

The previous prime is 164223193. The next prime is 164223253. The reversal of 164223240 is 42322461.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 164223240.

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, 684144 + ... + 684383.

It is an arithmetic number, because the mean of its divisors is an integer number (15395940).

Almost surely, 2^164223240 is an apocalyptic number.

164223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164223240 is an abundant number, since it is smaller than the sum of its proper divisors (328446840).

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

164223240 is a wasteful number, since it uses less digits than its factorization.

164223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368541 (or 1368537 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 164223240 is about 12814.9615684168. The cubic root of 164223240 is about 547.6186186140.

The spelling of 164223240 in words is "one hundred sixty-four million, two hundred twenty-three thousand, two hundred forty".