30489780 has 48 divisors (see below), whose sum is σ = 85619520. Its totient is φ = 8107008.

The previous prime is 30489749. The next prime is 30489821. The reversal of 30489780 is 8798403.

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 15 ways as a sum of consecutive naturals, for example, 32356 + ... + 33284.

It is an arithmetic number, because the mean of its divisors is an integer number (1783740).

Almost surely, 2^30489780 is an apocalyptic number.

30489780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30489780 is an abundant number, since it is smaller than the sum of its proper divisors (55129740).

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

30489780 is a wasteful number, since it uses less digits than its factorization.

30489780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 30489780 is about 5521.7551557453. The cubic root of 30489780 is about 312.4050869091.

The spelling of 30489780 in words is "thirty million, four hundred eighty-nine thousand, seven hundred eighty".