395559640 has 32 divisors (see below), whose sum is σ = 1017154080. Its totient is φ = 135620352.

The previous prime is 395559631. The next prime is 395559641. The reversal of 395559640 is 46955593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395559641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706077 + ... + 706636.

It is an arithmetic number, because the mean of its divisors is an integer number (31786065).

Almost surely, 2^395559640 is an apocalyptic number.

It is an amenable number.

395559640 is an abundant number, since it is smaller than the sum of its proper divisors (621594440).

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

395559640 is a wasteful number, since it uses less digits than its factorization.

395559640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412731 (or 1412727 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 395559640 is about 19888.6812031366. The cubic root of 395559640 is about 734.0697441814.

The spelling of 395559640 in words is "three hundred ninety-five million, five hundred fifty-nine thousand, six hundred forty".