385569720 has 160 divisors (see below), whose sum is σ = 1318561200. Its totient is φ = 101025792.

The previous prime is 385569719. The next prime is 385569731. The reversal of 385569720 is 27965583.

It is a happy number.

385569720 is a `hidden beast` number, since 3 + 8 + 556 + 97 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 190152 + ... + 192168.

Almost surely, 2^385569720 is an apocalyptic number.

385569720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385569720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659280600).

385569720 is an abundant number, since it is smaller than the sum of its proper divisors (932991480).

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

385569720 is a wasteful number, since it uses less digits than its factorization.

385569720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 385569720 is about 19635.9293133786. The cubic root of 385569720 is about 727.8372970938.

The spelling of 385569720 in words is "three hundred eighty-five million, five hundred sixty-nine thousand, seven hundred twenty".