393281140 has 96 divisors (see below), whose sum is σ = 1011838464. Its totient is φ = 125452800.

The previous prime is 393281131. The next prime is 393281153. The reversal of 393281140 is 41182393.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117490 + ... + 120790.

It is an arithmetic number, because the mean of its divisors is an integer number (10539984).

Almost surely, 2^393281140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393281140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505919232).

393281140 is an abundant number, since it is smaller than the sum of its proper divisors (618557324).

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

393281140 is a wasteful number, since it uses less digits than its factorization.

393281140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3375 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 393281140 is about 19831.3171524233. The cubic root of 393281140 is about 732.6575680166.

The spelling of 393281140 in words is "three hundred ninety-three million, two hundred eighty-one thousand, one hundred forty".