394248440 has 16 divisors (see below), whose sum is σ = 887059080. Its totient is φ = 157699360.

The previous prime is 394248409. The next prime is 394248511. The reversal of 394248440 is 44842493.

It is a junction number, because it is equal to n+sod(n) for n = 394248394 and 394248403.

It is a congruent number.

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, 4928066 + ... + 4928145.

Almost surely, 2^394248440 is an apocalyptic number.

It is an amenable number.

394248440 is an abundant number, since it is smaller than the sum of its proper divisors (492810640).

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

394248440 is a wasteful number, since it uses less digits than its factorization.

394248440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856222 (or 9856218 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 394248440 is about 19855.6903682546. The cubic root of 394248440 is about 733.2577488673.

The spelling of 394248440 in words is "three hundred ninety-four million, two hundred forty-eight thousand, four hundred forty".