30489540 has 24 divisors (see below), whose sum is σ = 85370880. Its totient is φ = 8130528.

The previous prime is 30489533. The next prime is 30489541. The reversal of 30489540 is 4598403.

It is a super-2 number, since 2×30489540² = 1859224098823200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30489541) 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 7 ways as a sum of consecutive naturals, for example, 254020 + ... + 254139.

It is an arithmetic number, because the mean of its divisors is an integer number (3557120).

Almost surely, 2^30489540 is an apocalyptic number.

30489540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30489540 is an abundant number, since it is smaller than the sum of its proper divisors (54881340).

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

30489540 is a wasteful number, since it uses less digits than its factorization.

30489540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508171 (or 508169 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 30489540 is about 5521.7334234822. The cubic root of 30489540 is about 312.4042672091.

The spelling of 30489540 in words is "thirty million, four hundred eighty-nine thousand, five hundred forty".