394649974 has 4 divisors (see below), whose sum is σ = 591974964. Its totient is φ = 197324986.

The previous prime is 394649963. The next prime is 394649989. The reversal of 394649974 is 479946493.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98662492 + ... + 98662495.

It is an arithmetic number, because the mean of its divisors is an integer number (147993741).

Almost surely, 2^394649974 is an apocalyptic number.

394649974 is a deficient number, since it is larger than the sum of its proper divisors (197324990).

394649974 is a wasteful number, since it uses less digits than its factorization.

394649974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197324989.

The product of its digits is 5878656, while the sum is 55.

The square root of 394649974 is about 19865.7991029810. The cubic root of 394649974 is about 733.5066004266.

The spelling of 394649974 in words is "three hundred ninety-four million, six hundred forty-nine thousand, nine hundred seventy-four".