393451842 has 64 divisors (see below), whose sum is σ = 959938560. Its totient is φ = 104944896.

The previous prime is 393451811. The next prime is 393451853. The reversal of 393451842 is 248154393.

It is a self number, because there is not a number n which added to its sum of digits gives 393451842.

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, 88509 + ... + 92847.

It is an arithmetic number, because the mean of its divisors is an integer number (14999040).

Almost surely, 2^393451842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393451842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479969280).

393451842 is an abundant number, since it is smaller than the sum of its proper divisors (566486718).

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

393451842 is a wasteful number, since it uses less digits than its factorization.

393451842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495.

The product of its digits is 103680, while the sum is 39.

The square root of 393451842 is about 19835.6205347854. The cubic root of 393451842 is about 732.7635549803.

The spelling of 393451842 in words is "three hundred ninety-three million, four hundred fifty-one thousand, eight hundred forty-two".