393696720 has 320 divisors, whose sum is σ = 1462406400. Its totient is φ = 97044480.

The previous prime is 393696707. The next prime is 393696733. The reversal of 393696720 is 27696393.

It is an interprime number because it is at equal distance from previous prime (393696707) and next prime (393696733).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2175030 + ... + 2175210.

It is an arithmetic number, because the mean of its divisors is an integer number (4570020).

Almost surely, 2^393696720 is an apocalyptic number.

393696720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393696720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731203200).

393696720 is an abundant number, since it is smaller than the sum of its proper divisors (1068709680).

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

393696720 is a wasteful number, since it uses less digits than its factorization.

393696720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 393696720 is about 19841.7922577574. The cubic root of 393696720 is about 732.9155434756.

The spelling of 393696720 in words is "three hundred ninety-three million, six hundred ninety-six thousand, seven hundred twenty".