30494778 has 8 divisors (see below), whose sum is σ = 60989568. Its totient is φ = 10164924.

The previous prime is 30494773. The next prime is 30494797. The reversal of 30494778 is 87749403.

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

30494778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (30494773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541226 + ... + 2541237.

It is an arithmetic number, because the mean of its divisors is an integer number (7623696).

Almost surely, 2^30494778 is an apocalyptic number.

30494778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30494778 is a wasteful number, since it uses less digits than its factorization.

30494778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082468.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 30494778 is about 5522.2077106896. The cubic root of 30494778 is about 312.4221561840.

The spelling of 30494778 in words is "thirty million, four hundred ninety-four thousand, seven hundred seventy-eight".