395690399 has 4 divisors (see below), whose sum is σ = 426128136. Its totient is φ = 365252664.

The previous prime is 395690377. The next prime is 395690437. The reversal of 395690399 is 993096593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993096593 = 22483 ⋅44171.

It is a cyclic number.

It is not a de Polignac number, because 395690399 - 2¹² = 395686303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395690399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395690369) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15218849 + ... + 15218874.

It is an arithmetic number, because the mean of its divisors is an integer number (106532034).

Almost surely, 2^395690399 is an apocalyptic number.

395690399 is a deficient number, since it is larger than the sum of its proper divisors (30437737).

395690399 is a wasteful number, since it uses less digits than its factorization.

395690399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30437736.

The product of its (nonzero) digits is 1771470, while the sum is 53.

The square root of 395690399 is about 19891.9682032724. The cubic root of 395690399 is about 734.1506217038.

The spelling of 395690399 in words is "three hundred ninety-five million, six hundred ninety thousand, three hundred ninety-nine".