30404918 has 4 divisors (see below), whose sum is σ = 45607380. Its totient is φ = 15202458.

The previous prime is 30404917. The next prime is 30404929. The reversal of 30404918 is 81940403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81940403 = 397 ⋅206399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30404917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7601228 + ... + 7601231.

It is an arithmetic number, because the mean of its divisors is an integer number (11401845).

Almost surely, 2^30404918 is an apocalyptic number.

30404918 is a deficient number, since it is larger than the sum of its proper divisors (15202462).

30404918 is a wasteful number, since it uses less digits than its factorization.

30404918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15202461.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30404918 is about 5514.0654693248. The cubic root of 30404918 is about 312.1149792637.

The spelling of 30404918 in words is "thirty million, four hundred four thousand, nine hundred eighteen".