395889390 has 192 divisors, whose sum is σ = 1183049280. Its totient is φ = 93623040.

The previous prime is 395889367. The next prime is 395889401. The reversal of 395889390 is 93988593.

395889390 is a `hidden beast` number, since 395 + 88 + 93 + 90 = 666.

It is a super-2 number, since 2×395889390² = 313456818229144200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6489960 + ... + 6490020.

It is an arithmetic number, because the mean of its divisors is an integer number (6161715).

Almost surely, 2^395889390 is an apocalyptic number.

395889390 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 395889390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591524640).

395889390 is an abundant number, since it is smaller than the sum of its proper divisors (787159890).

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

395889390 is a wasteful number, since it uses less digits than its factorization.

395889390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 395889390 is about 19896.9693672177. The cubic root of 395889390 is about 734.2736681431.

The spelling of 395889390 in words is "three hundred ninety-five million, eight hundred eighty-nine thousand, three hundred ninety".