30406780 has 12 divisors (see below), whose sum is σ = 63854280. Its totient is φ = 12162704.

The previous prime is 30406777. The next prime is 30406787. The reversal of 30406780 is 8760403.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30406787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760150 + ... + 760189.

It is an arithmetic number, because the mean of its divisors is an integer number (5321190).

Almost surely, 2^30406780 is an apocalyptic number.

It is an amenable number.

30406780 is an abundant number, since it is smaller than the sum of its proper divisors (33447500).

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

30406780 is a wasteful number, since it uses less digits than its factorization.

30406780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520348 (or 1520346 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 30406780 is about 5514.2343076804. The cubic root of 30406780 is about 312.1213504504.

The spelling of 30406780 in words is "thirty million, four hundred six thousand, seven hundred eighty".