385658520 has 128 divisors (see below), whose sum is σ = 1254052800. Its totient is φ = 94316544.

The previous prime is 385658479. The next prime is 385658573. The reversal of 385658520 is 25856583.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 269166 + ... + 270594.

Almost surely, 2^385658520 is an apocalyptic number.

385658520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385658520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627026400).

385658520 is an abundant number, since it is smaller than the sum of its proper divisors (868394280).

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

385658520 is a wasteful number, since it uses less digits than its factorization.

385658520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 385658520 is about 19638.1903443265. The cubic root of 385658520 is about 727.8931685204.

The spelling of 385658520 in words is "three hundred eighty-five million, six hundred fifty-eight thousand, five hundred twenty".