30489888 has 96 divisors (see below), whose sum is σ = 94070592. Its totient is φ = 8524800.

The previous prime is 30489869. The next prime is 30489911. The reversal of 30489888 is 88898403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12618 + ... + 14838.

It is an arithmetic number, because the mean of its divisors is an integer number (979902).

Almost surely, 2^30489888 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 30489888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47035296).

30489888 is an abundant number, since it is smaller than the sum of its proper divisors (63580704).

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

30489888 is a wasteful number, since it uses less digits than its factorization.

30489888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258 (or 2250 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 30489888 is about 5521.7649352358. The cubic root of 30489888 is about 312.4054557727.

The spelling of 30489888 in words is "thirty million, four hundred eighty-nine thousand, eight hundred eighty-eight".