30488640 has 224 divisors, whose sum is σ = 119481600. Its totient is φ = 6414336.

The previous prime is 30488617. The next prime is 30488659. The reversal of 30488640 is 4688403.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87186 + ... + 87534.

It is an arithmetic number, because the mean of its divisors is an integer number (533400).

Almost surely, 2^30488640 is an apocalyptic number.

30488640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30488640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59740800).

30488640 is an abundant number, since it is smaller than the sum of its proper divisors (88992960).

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

30488640 is a wasteful number, since it uses less digits than its factorization.

30488640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 30488640 is about 5521.6519267335. The cubic root of 30488640 is about 312.4011932958.

The spelling of 30488640 in words is "thirty million, four hundred eighty-eight thousand, six hundred forty".