385757550 has 72 divisors (see below), whose sum is σ = 1050688704. Its totient is φ = 101450880.

The previous prime is 385757549. The next prime is 385757563. The reversal of 385757550 is 55757583.

385757550 is a `hidden beast` number, since 3 + 8 + 575 + 75 + 5 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 385757496 and 385757505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26979 + ... + 38721.

Almost surely, 2^385757550 is an apocalyptic number.

385757550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 385757550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525344352).

385757550 is an abundant number, since it is smaller than the sum of its proper divisors (664931154).

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

385757550 is a wasteful number, since it uses less digits than its factorization.

385757550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834 (or 11826 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 45.

The square root of 385757550 is about 19640.7115451554. The cubic root of 385757550 is about 727.9554663717.

The spelling of 385757550 in words is "three hundred eighty-five million, seven hundred fifty-seven thousand, five hundred fifty".