620165730 has 48 divisors (see below), whose sum is σ = 1499038272. Its totient is φ = 164203200.

The previous prime is 620165723. The next prime is 620165743. The reversal of 620165730 is 37561026.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 982515 + ... + 983145.

It is an arithmetic number, because the mean of its divisors is an integer number (31229964).

Almost surely, 2^620165730 is an apocalyptic number.

620165730 is an abundant number, since it is smaller than the sum of its proper divisors (878872542).

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

620165730 is a wasteful number, since it uses less digits than its factorization.

620165730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 620165730 is about 24903.1269120968. The cubic root of 620165730 is about 852.7778691323. Note that the first 3 decimals are identical.

The spelling of 620165730 in words is "six hundred twenty million, one hundred sixty-five thousand, seven hundred thirty".