164780730 has 192 divisors, whose sum is σ = 484323840. Its totient is φ = 40170816.

The previous prime is 164780729. The next prime is 164780743. The reversal of 164780730 is 37087461.

164780730 is a `hidden beast` number, since 1 + 647 + 8 + 0 + 7 + 3 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1985269 + ... + 1985351.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^164780730 is an apocalyptic number.

164780730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 164780730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242161920).

164780730 is an abundant number, since it is smaller than the sum of its proper divisors (319543110).

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

164780730 is a wasteful number, since it uses less digits than its factorization.

164780730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 164780730 is about 12836.6946680210. The cubic root of 164780730 is about 548.2375872300.

The spelling of 164780730 in words is "one hundred sixty-four million, seven hundred eighty thousand, seven hundred thirty".