385351220 has 12 divisors (see below), whose sum is σ = 809237604. Its totient is φ = 154140480.

The previous prime is 385351207. The next prime is 385351231. The reversal of 385351220 is 22153583.

It can be written as a sum of positive squares in 2 ways, for example, as 171138724 + 214212496 = 13082^2 + 14636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9633761 + ... + 9633800.

It is an arithmetic number, because the mean of its divisors is an integer number (67436467).

Almost surely, 2^385351220 is an apocalyptic number.

It is an amenable number.

385351220 is an abundant number, since it is smaller than the sum of its proper divisors (423886384).

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

385351220 is a wasteful number, since it uses less digits than its factorization.

385351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19267570 (or 19267568 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 385351220 is about 19630.3647444463. The cubic root of 385351220 is about 727.6997841344.

The spelling of 385351220 in words is "three hundred eighty-five million, three hundred fifty-one thousand, two hundred twenty".