393980000 has 60 divisors (see below), whose sum is σ = 969299100. Its totient is φ = 157584000.

The previous prime is 393979997. The next prime is 393980009. The reversal of 393980000 is 89393.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393980009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10151 + ... + 29849.

It is an arithmetic number, because the mean of its divisors is an integer number (16154985).

Almost surely, 2^393980000 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 393980000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484649550).

393980000 is an abundant number, since it is smaller than the sum of its proper divisors (575319100).

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

393980000 is an equidigital number, since it uses as much as digits as its factorization.

393980000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19729 (or 19706 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 393980000 is about 19848.9294421639. The cubic root of 393980000 is about 733.0912883468.

The spelling of 393980000 in words is "three hundred ninety-three million, nine hundred eighty thousand".