385661898 has 48 divisors (see below), whose sum is σ = 917542080. Its totient is φ = 120989376.

The previous prime is 385661897. The next prime is 385661909. The reversal of 385661898 is 898166583.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385661891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15078 + ... + 31601.

It is an arithmetic number, because the mean of its divisors is an integer number (19115460).

Almost surely, 2^385661898 is an apocalyptic number.

385661898 is an abundant number, since it is smaller than the sum of its proper divisors (531880182).

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

385661898 is a wasteful number, since it uses less digits than its factorization.

385661898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46713 (or 46701 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 385661898 is about 19638.2763500262. The cubic root of 385661898 is about 727.8952937303.

The spelling of 385661898 in words is "three hundred eighty-five million, six hundred sixty-one thousand, eight hundred ninety-eight".