164334640 has 40 divisors (see below), whose sum is σ = 382743360. Its totient is φ = 65619456.

The previous prime is 164334623. The next prime is 164334641. The reversal of 164334640 is 46433461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (164334641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56092 + ... + 58948.

It is an arithmetic number, because the mean of its divisors is an integer number (9568584).

Almost surely, 2^164334640 is an apocalyptic number.

164334640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164334640 is an abundant number, since it is smaller than the sum of its proper divisors (218408720).

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

164334640 is a wasteful number, since it uses less digits than its factorization.

164334640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589 (or 3583 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 164334640 is about 12819.3073135798. The cubic root of 164334640 is about 547.7424153946.

The spelling of 164334640 in words is "one hundred sixty-four million, three hundred thirty-four thousand, six hundred forty".