30506404 has 6 divisors (see below), whose sum is σ = 53386214. Its totient is φ = 15253200.

The previous prime is 30506353. The next prime is 30506423. The reversal of 30506404 is 40460503.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 12460900 = 4248^2 + 3530^2 .

It is a super-2 number, since 2×30506404² = 1861281370022432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3813297 + ... + 3813304.

Almost surely, 2^30506404 is an apocalyptic number.

It is an amenable number.

30506404 is a deficient number, since it is larger than the sum of its proper divisors (22879810).

30506404 is a wasteful number, since it uses less digits than its factorization.

30506404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626605 (or 7626603 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30506404 is about 5523.2602690802. The cubic root of 30506404 is about 312.4618543306.

Adding to 30506404 its reverse (40460503), we get a palindrome (70966907).

The spelling of 30506404 in words is "thirty million, five hundred six thousand, four hundred four".