30489732 has 144 divisors (see below), whose sum is σ = 97598592. Its totient is φ = 7810560.

The previous prime is 30489731. The next prime is 30489733. The reversal of 30489732 is 23798403.

It is an interprime number because it is at equal distance from previous prime (30489731) and next prime (30489733).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30489731) 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 47 ways as a sum of consecutive naturals, for example, 134203 + ... + 134429.

It is an arithmetic number, because the mean of its divisors is an integer number (677768).

Almost surely, 2^30489732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30489732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48799296).

30489732 is an abundant number, since it is smaller than the sum of its proper divisors (67108860).

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

30489732 is a wasteful number, since it uses less digits than its factorization.

30489732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 30489732 is about 5521.7508092995. The cubic root of 30489732 is about 312.4049229694.

The spelling of 30489732 in words is "thirty million, four hundred eighty-nine thousand, seven hundred thirty-two".