164865740 has 48 divisors (see below), whose sum is σ = 375181632. Its totient is φ = 60493056.

The previous prime is 164865739. The next prime is 164865749. The reversal of 164865740 is 47568461.

It is not an unprimeable number, because it can be changed into a prime (164865749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41522 + ... + 45318.

It is an arithmetic number, because the mean of its divisors is an integer number (7816284).

Almost surely, 2^164865740 is an apocalyptic number.

164865740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164865740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187590816).

164865740 is an abundant number, since it is smaller than the sum of its proper divisors (210315892).

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

164865740 is a wasteful number, since it uses less digits than its factorization.

164865740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986 (or 3984 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 164865740 is about 12840.0054517122. The cubic root of 164865740 is about 548.3318491926.

The spelling of 164865740 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, seven hundred forty".