385449870 has 128 divisors (see below), whose sum is σ = 1052642304. Its totient is φ = 89616384.

The previous prime is 385449853. The next prime is 385449881. The reversal of 385449870 is 78944583.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 869869 + ... + 870311.

It is an arithmetic number, because the mean of its divisors is an integer number (8223768).

Almost surely, 2^385449870 is an apocalyptic number.

385449870 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 385449870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526321152).

385449870 is an abundant number, since it is smaller than the sum of its proper divisors (667192434).

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

385449870 is a wasteful number, since it uses less digits than its factorization.

385449870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 385449870 is about 19632.8772725752. The cubic root of 385449870 is about 727.7618759397.

The spelling of 385449870 in words is "three hundred eighty-five million, four hundred forty-nine thousand, eight hundred seventy".