409464394 has 4 divisors (see below), whose sum is σ = 614196594. Its totient is φ = 204732196.

The previous prime is 409464389. The next prime is 409464401. The reversal of 409464394 is 493464904.

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

It can be written as a sum of positive squares in only one way, i.e., 271096225 + 138368169 = 16465^2 + 11763^2 .

It is a super-2 number, since 2×409464394² = 335322179907574472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 409464394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102366097 + ... + 102366100.

Almost surely, 2^409464394 is an apocalyptic number.

409464394 is a deficient number, since it is larger than the sum of its proper divisors (204732200).

409464394 is a wasteful number, since it uses less digits than its factorization.

409464394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204732199.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 409464394 is about 20235.2265616177. The cubic root of 409464394 is about 742.5722476528.

The spelling of 409464394 in words is "four hundred nine million, four hundred sixty-four thousand, three hundred ninety-four".