394307648 has 28 divisors (see below), whose sum is σ = 894234432. Its totient is φ = 168988800.

The previous prime is 394307633. The next prime is 394307671. The reversal of 394307648 is 846703493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 394307599 and 394307608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439628 + ... + 440523.

It is an arithmetic number, because the mean of its divisors is an integer number (31936944).

Almost surely, 2^394307648 is an apocalyptic number.

It is an amenable number.

394307648 is an abundant number, since it is smaller than the sum of its proper divisors (499926784).

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

394307648 is an equidigital number, since it uses as much as digits as its factorization.

394307648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880170 (or 880160 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 394307648 is about 19857.1812702609. The cubic root of 394307648 is about 733.2944537698.

The spelling of 394307648 in words is "three hundred ninety-four million, three hundred seven thousand, six hundred forty-eight".