385525540 has 24 divisors (see below), whose sum is σ = 844804800. Its totient is φ = 147505248.

The previous prime is 385525513. The next prime is 385525549. The reversal of 385525540 is 45525583.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 385525540.

It is not an unprimeable number, because it can be changed into a prime (385525549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418590 + ... + 419509.

It is an arithmetic number, because the mean of its divisors is an integer number (35200200).

Almost surely, 2^385525540 is an apocalyptic number.

It is an amenable number.

385525540 is an abundant number, since it is smaller than the sum of its proper divisors (459279260).

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

385525540 is a wasteful number, since it uses less digits than its factorization.

385525540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838131 (or 838129 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The square root of 385525540 is about 19634.8043025644. The cubic root of 385525540 is about 727.8094966050.

The spelling of 385525540 in words is "three hundred eighty-five million, five hundred twenty-five thousand, five hundred forty".