164863880 has 32 divisors (see below), whose sum is σ = 371309400. Its totient is φ = 65880576.

The previous prime is 164863861. The next prime is 164863883. The reversal of 164863880 is 88368461.

It can be written as a sum of positive squares in 4 ways, for example, as 140043556 + 24820324 = 11834^2 + 4982^2 .

It is not an unprimeable number, because it can be changed into a prime (164863883) 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, 77876 + ... + 79964.

Almost surely, 2^164863880 is an apocalyptic number.

164863880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164863880 is an abundant number, since it is smaller than the sum of its proper divisors (206445520).

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

164863880 is a wasteful number, since it uses less digits than its factorization.

164863880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 164863880 is about 12839.9330216322. The cubic root of 164863880 is about 548.3297871085.

The spelling of 164863880 in words is "one hundred sixty-four million, eight hundred sixty-three thousand, eight hundred eighty".