394340694 has 60 divisors (see below), whose sum is σ = 880685820. Its totient is φ = 117713640.

The previous prime is 394340693. The next prime is 394340707. The reversal of 394340694 is 496043493.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394340693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5885649 + ... + 5885715.

It is an arithmetic number, because the mean of its divisors is an integer number (14678097).

Almost surely, 2^394340694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394340694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440342910).

394340694 is an abundant number, since it is smaller than the sum of its proper divisors (486345126).

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

394340694 is an frugal number, since it uses more digits than its factorization.

394340694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 394340694 is about 19858.0133447432. The cubic root of 394340694 is about 733.3149384275.

Multiplying 394340694 by its product of nonzero digits (279936), we get a square (110390156515584 = 10506672²).

The spelling of 394340694 in words is "three hundred ninety-four million, three hundred forty thousand, six hundred ninety-four".