385024820 has 12 divisors (see below), whose sum is σ = 808552164. Its totient is φ = 154009920.

The previous prime is 385024777. The next prime is 385024837. The reversal of 385024820 is 28420583.

It can be written as a sum of positive squares in 2 ways, for example, as 137780644 + 247244176 = 11738^2 + 15724^2 .

It is a super-2 number, since 2×385024820² = 296488224032064800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9625601 + ... + 9625640.

It is an arithmetic number, because the mean of its divisors is an integer number (67379347).

Almost surely, 2^385024820 is an apocalyptic number.

It is an amenable number.

385024820 is an abundant number, since it is smaller than the sum of its proper divisors (423527344).

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

385024820 is a wasteful number, since it uses less digits than its factorization.

385024820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19251250 (or 19251248 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 385024820 is about 19622.0493323200. The cubic root of 385024820 is about 727.4942674607.

The spelling of 385024820 in words is "three hundred eighty-five million, twenty-four thousand, eight hundred twenty".