393613836 has 48 divisors (see below), whose sum is σ = 1145061120. Its totient is φ = 102237120.

The previous prime is 393613819. The next prime is 393613837. The reversal of 393613836 is 638316393.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (393613837) by changing a digit.

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, 212071 + ... + 213918.

It is an arithmetic number, because the mean of its divisors is an integer number (23855440).

Almost surely, 2^393613836 is an apocalyptic number.

It is an amenable number.

393613836 is an abundant number, since it is smaller than the sum of its proper divisors (751447284).

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

393613836 is a wasteful number, since it uses less digits than its factorization.

393613836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426014 (or 426012 counting only the distinct ones).

The product of its digits is 209952, while the sum is 42.

The square root of 393613836 is about 19839.7035260107. The cubic root of 393613836 is about 732.8641068982.

The spelling of 393613836 in words is "three hundred ninety-three million, six hundred thirteen thousand, eight hundred thirty-six".