395071940 has 48 divisors (see below), whose sum is σ = 896952000. Its totient is φ = 145660032.

The previous prime is 395071939. The next prime is 395071973. The reversal of 395071940 is 49170593.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 395071894 and 395071903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11 + ... + 28109.

It is an arithmetic number, because the mean of its divisors is an integer number (18686500).

Almost surely, 2^395071940 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 395071940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448476000).

395071940 is an abundant number, since it is smaller than the sum of its proper divisors (501880060).

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

395071940 is a wasteful number, since it uses less digits than its factorization.

395071940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28164 (or 28162 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 395071940 is about 19876.4166790697. The cubic root of 395071940 is about 733.7679329316.

The spelling of 395071940 in words is "three hundred ninety-five million, seventy-one thousand, nine hundred forty".