30890018 has 8 divisors (see below), whose sum is σ = 46422300. Its totient is φ = 15415920.

The previous prime is 30890011. The next prime is 30890021. The reversal of 30890018 is 81009803.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29408929 + 1481089 = 5423^2 + 1217^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30890011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13193 + ... + 15356.

Almost surely, 2^30890018 is an apocalyptic number.

30890018 is a deficient number, since it is larger than the sum of its proper divisors (15532282).

30890018 is a wasteful number, since it uses less digits than its factorization.

30890018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29092.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 30890018 is about 5557.8789119591. The cubic root of 30890018 is about 313.7661246825.

The spelling of 30890018 in words is "thirty million, eight hundred ninety thousand, eighteen".