164441620 has 24 divisors (see below), whose sum is σ = 394660224. Its totient is φ = 56379936.

The previous prime is 164441617. The next prime is 164441621. The reversal of 164441620 is 26144461.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164441621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587152 + ... + 587431.

It is an arithmetic number, because the mean of its divisors is an integer number (16444176).

Almost surely, 2^164441620 is an apocalyptic number.

164441620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164441620 is an abundant number, since it is smaller than the sum of its proper divisors (230218604).

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

164441620 is a wasteful number, since it uses less digits than its factorization.

164441620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174599 (or 1174597 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 164441620 is about 12823.4792470686. The cubic root of 164441620 is about 547.8612476602.

It can be divided in two parts, 1644 and 41620, that added together give a square (43264 = 208²).

The spelling of 164441620 in words is "one hundred sixty-four million, four hundred forty-one thousand, six hundred twenty".