164479986 has 96 divisors (see below), whose sum is σ = 406388736. Its totient is φ = 47628000.

The previous prime is 164479963. The next prime is 164479993. The reversal of 164479986 is 689974461.

164479986 is a `hidden beast` number, since 164 + 479 + 9 + 8 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 779421 + ... + 779631.

It is an arithmetic number, because the mean of its divisors is an integer number (4233216).

Almost surely, 2^164479986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164479986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203194368).

164479986 is an abundant number, since it is smaller than the sum of its proper divisors (241908750).

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

164479986 is a wasteful number, since it uses less digits than its factorization.

164479986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 385 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 164479986 is about 12824.9750876951. The cubic root of 164479986 is about 547.9038516558.

The spelling of 164479986 in words is "one hundred sixty-four million, four hundred seventy-nine thousand, nine hundred eighty-six".