30545780 has 12 divisors (see below), whose sum is σ = 64146180. Its totient is φ = 12218304.

The previous prime is 30545773. The next prime is 30545791. The reversal of 30545780 is 8754503.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6770404 + 23775376 = 2602^2 + 4876^2 .

It is a congruent number.

It is an unprimeable number.

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, 763625 + ... + 763664.

It is an arithmetic number, because the mean of its divisors is an integer number (5345515).

Almost surely, 2^30545780 is an apocalyptic number.

It is an amenable number.

30545780 is an abundant number, since it is smaller than the sum of its proper divisors (33600400).

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

30545780 is a wasteful number, since it uses less digits than its factorization.

30545780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527298 (or 1527296 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 30545780 is about 5526.8236809220. The cubic root of 30545780 is about 312.5962327626.

The spelling of 30545780 in words is "thirty million, five hundred forty-five thousand, seven hundred eighty".