395128540 has 24 divisors (see below), whose sum is σ = 834573600. Its totient is φ = 157136448.

The previous prime is 395128529. The next prime is 395128609. The reversal of 395128540 is 45821593.

It is a super-2 number, since 2×395128540² = 312253126245063200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 395128540.

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 7 ways as a sum of consecutive naturals, for example, 53640 + ... + 60559.

It is an arithmetic number, because the mean of its divisors is an integer number (34773900).

Almost surely, 2^395128540 is an apocalyptic number.

It is an amenable number.

395128540 is an abundant number, since it is smaller than the sum of its proper divisors (439445060).

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

395128540 is a wasteful number, since it uses less digits than its factorization.

395128540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114381 (or 114379 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 395128540 is about 19877.8404259618. The cubic root of 395128540 is about 733.8029723575.

The spelling of 395128540 in words is "three hundred ninety-five million, one hundred twenty-eight thousand, five hundred forty".