30001440 has 96 divisors (see below), whose sum is σ = 108017280. Its totient is φ = 6856704.

The previous prime is 30001427. The next prime is 30001451. The reversal of 30001440 is 4410003.

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 (12).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1105 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (1125180).

Almost surely, 2^30001440 is an apocalyptic number.

30001440 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 30001440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54008640).

30001440 is an abundant number, since it is smaller than the sum of its proper divisors (78015840).

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

30001440 is a wasteful number, since it uses less digits than its factorization.

30001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8954 (or 8946 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 30001440 is about 5477.3570268881. The cubic root of 30001440 is about 310.7282220879.

Adding to 30001440 its reverse (4410003), we get a palindrome (34411443).

The spelling of 30001440 in words is "thirty million, one thousand, four hundred forty".