394340634 has 12 divisors (see below), whose sum is σ = 854404746. Its totient is φ = 131446872.

The previous prime is 394340629. The next prime is 394340641. The reversal of 394340634 is 436043493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 302238225 + 92102409 = 17385^2 + 9597^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10953889 + ... + 10953924.

Almost surely, 2^394340634 is an apocalyptic number.

394340634 is an abundant number, since it is smaller than the sum of its proper divisors (460064112).

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

394340634 is a wasteful number, since it uses less digits than its factorization.

394340634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21907821 (or 21907818 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 394340634 is about 19858.0118340180. The cubic root of 394340634 is about 733.3149012355.

The spelling of 394340634 in words is "three hundred ninety-four million, three hundred forty thousand, six hundred thirty-four".