30008978 has 8 divisors (see below), whose sum is σ = 47661372. Its totient is φ = 14121856.

The previous prime is 30008977. The next prime is 30008989. The reversal of 30008978 is 87980003.

It can be written as a sum of positive squares in 2 ways, for example, as 29997529 + 11449 = 5477^2 + 107^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30008977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441275 + ... + 441342.

Almost surely, 2^30008978 is an apocalyptic number.

30008978 is a deficient number, since it is larger than the sum of its proper divisors (17652394).

30008978 is a wasteful number, since it uses less digits than its factorization.

30008978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882636.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 30008978 is about 5478.0450892631. The cubic root of 30008978 is about 310.7542438743.

The spelling of 30008978 in words is "thirty million, eight thousand, nine hundred seventy-eight".