393980248 has 16 divisors (see below), whose sum is σ = 770831280. Its totient is φ = 188425248.

The previous prime is 393980243. The next prime is 393980269. The reversal of 393980248 is 842089393.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 393980198 and 393980207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393980243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1070415 + ... + 1070782.

It is an arithmetic number, because the mean of its divisors is an integer number (48176955).

Almost surely, 2^393980248 is an apocalyptic number.

It is an amenable number.

393980248 is a deficient number, since it is larger than the sum of its proper divisors (376851032).

393980248 is a wasteful number, since it uses less digits than its factorization.

393980248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141226 (or 2141222 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 393980248 is about 19848.9356893512. The cubic root of 393980248 is about 733.0914421673.

The spelling of 393980248 in words is "three hundred ninety-three million, nine hundred eighty thousand, two hundred forty-eight".