394577642 has 8 divisors (see below), whose sum is σ = 592165956. Its totient is φ = 197188992.

The previous prime is 394577621. The next prime is 394577681. The reversal of 394577642 is 246775493.

It can be written as a sum of positive squares in 2 ways, for example, as 367527241 + 27050401 = 19171^2 + 5201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 44873 + ... + 52940.

Almost surely, 2^394577642 is an apocalyptic number.

394577642 is a deficient number, since it is larger than the sum of its proper divisors (197588314).

394577642 is a wasteful number, since it uses less digits than its factorization.

394577642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99832.

The product of its digits is 1270080, while the sum is 47.

The square root of 394577642 is about 19863.9785038144. The cubic root of 394577642 is about 733.4617849829.

The spelling of 394577642 in words is "three hundred ninety-four million, five hundred seventy-seven thousand, six hundred forty-two".