393896238 has 16 divisors (see below), whose sum is σ = 787987200. Its totient is φ = 131266296.

The previous prime is 393896233. The next prime is 393896257. The reversal of 393896238 is 832698393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393896231) 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, 41931 + ... + 50457.

It is an arithmetic number, because the mean of its divisors is an integer number (49249200).

Almost surely, 2^393896238 is an apocalyptic number.

393896238 is an abundant number, since it is smaller than the sum of its proper divisors (394090962).

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

393896238 is a wasteful number, since it uses less digits than its factorization.

393896238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16231.

The product of its digits is 1679616, while the sum is 51.

The square root of 393896238 is about 19846.8193421515. The cubic root of 393896238 is about 733.0393317799.

The spelling of 393896238 in words is "three hundred ninety-three million, eight hundred ninety-six thousand, two hundred thirty-eight".