385390720 has 128 divisors (see below), whose sum is σ = 1082652480. Its totient is φ = 129331200.

The previous prime is 385390703. The next prime is 385390757. The reversal of 385390720 is 27093583.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 385390720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89415 + ... + 93625.

Almost surely, 2^385390720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385390720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541326240).

385390720 is an abundant number, since it is smaller than the sum of its proper divisors (697261760).

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

385390720 is a wasteful number, since it uses less digits than its factorization.

385390720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 385390720 is about 19631.3708130635. The cubic root of 385390720 is about 727.7246473050.

The spelling of 385390720 in words is "three hundred eighty-five million, three hundred ninety thousand, seven hundred twenty".