385290 has 32 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 102672.

The previous prime is 385289. The next prime is 385291. The reversal of 385290 is 92583.

It is an interprime number because it is at equal distance from previous prime (385289) and next prime (385291).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 385290.

It is not an unprimeable number, because it can be changed into a prime (385291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (32130).

2³⁸⁵²⁹⁰ is an apocalyptic number.

385290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

385290 is an abundant number, since it is smaller than the sum of its proper divisors (642870).

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

385290 is a wasteful number, since it uses less digits than its factorization.

385290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 385290 is about 620.7173269694. The cubic root of 385290 is about 72.7661246010.

The spelling of 385290 in words is "three hundred eighty-five thousand, two hundred ninety".