30489372 has 60 divisors (see below), whose sum is σ = 80397240. Its totient is φ = 10075104.

The previous prime is 30489359. The next prime is 30489383. The reversal of 30489372 is 27398403.

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

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 19 ways as a sum of consecutive naturals, for example, 44698 + ... + 45374.

It is an arithmetic number, because the mean of its divisors is an integer number (1339954).

Almost surely, 2^30489372 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 30489372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40198620).

30489372 is an abundant number, since it is smaller than the sum of its proper divisors (49907868).

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

30489372 is a wasteful number, since it uses less digits than its factorization.

30489372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 821 counting only the distinct ones).

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

The square root of 30489372 is about 5521.7182108471. The cubic root of 30489372 is about 312.4036934165.

It can be divided in two parts, 304 and 89372, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 30489372 in words is "thirty million, four hundred eighty-nine thousand, three hundred seventy-two".