385172730 has 48 divisors (see below), whose sum is σ = 1020357000. Its totient is φ = 100773504.

The previous prime is 385172719. The next prime is 385172779. The reversal of 385172730 is 37271583.

385172730 is a `hidden beast` number, since 385 + 1 + 7 + 273 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 382710969 + 2461761 = 19563^2 + 1569^2 .

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, 35605 + ... + 45144.

Almost surely, 2^385172730 is an apocalyptic number.

385172730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

385172730 is an abundant number, since it is smaller than the sum of its proper divisors (635184270).

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

385172730 is a wasteful number, since it uses less digits than its factorization.

385172730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80815 (or 80812 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 385172730 is about 19625.8179447380. The cubic root of 385172730 is about 727.5874128854.

The spelling of 385172730 in words is "three hundred eighty-five million, one hundred seventy-two thousand, seven hundred thirty".