385681128 has 32 divisors (see below), whose sum is σ = 1101946560. Its totient is φ = 110194560.

The previous prime is 385681117. The next prime is 385681129. The reversal of 385681128 is 821186583.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 385681128.

It is not an unprimeable number, because it can be changed into a prime (385681129) 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, 1147693 + ... + 1148028.

It is an arithmetic number, because the mean of its divisors is an integer number (34435830).

Almost surely, 2^385681128 is an apocalyptic number.

It is an amenable number.

385681128 is an abundant number, since it is smaller than the sum of its proper divisors (716265432).

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

385681128 is a wasteful number, since it uses less digits than its factorization.

385681128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295737 (or 2295733 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 385681128 is about 19638.7659490101. The cubic root of 385681128 is about 727.9073917138.

The spelling of 385681128 in words is "three hundred eighty-five million, six hundred eighty-one thousand, one hundred twenty-eight".