385499520 has 256 divisors, whose sum is σ = 1560844800. Its totient is φ = 88086528.

The previous prime is 385499519. The next prime is 385499557. The reversal of 385499520 is 25994583.

385499520 is a `hidden beast` number, since 3 + 85 + 49 + 9 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119367 + ... + 122553.

It is an arithmetic number, because the mean of its divisors is an integer number (6097050).

Almost surely, 2^385499520 is an apocalyptic number.

385499520 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 385499520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780422400).

385499520 is an abundant number, since it is smaller than the sum of its proper divisors (1175345280).

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

385499520 is a wasteful number, since it uses less digits than its factorization.

385499520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222 (or 3204 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 385499520 is about 19634.1416924703. The cubic root of 385499520 is about 727.7931223944.

The spelling of 385499520 in words is "three hundred eighty-five million, four hundred ninety-nine thousand, five hundred twenty".