394402426 has 16 divisors (see below), whose sum is σ = 647196480. Its totient is φ = 178770880.

The previous prime is 394402409. The next prime is 394402447. The reversal of 394402426 is 624204493.

It is a junction number, because it is equal to n+sod(n) for n = 394402391 and 394402400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17071 + ... + 32866.

It is an arithmetic number, because the mean of its divisors is an integer number (40449780).

Almost surely, 2^394402426 is an apocalyptic number.

394402426 is a deficient number, since it is larger than the sum of its proper divisors (252794054).

394402426 is a wasteful number, since it uses less digits than its factorization.

394402426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50309.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 394402426 is about 19859.5676186568. The cubic root of 394402426 is about 733.3532019869.

The spelling of 394402426 in words is "three hundred ninety-four million, four hundred two thousand, four hundred twenty-six".