30163440 has 80 divisors (see below), whose sum is σ = 99020448. Its totient is φ = 7569408.

The previous prime is 30163439. The next prime is 30163453. The reversal of 30163440 is 4436103.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×30163440² = 1819666225267200, which contains 22 as substring.

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, 384 + ... + 7776.

Almost surely, 2^30163440 is an apocalyptic number.

30163440 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 30163440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49510224).

30163440 is an abundant number, since it is smaller than the sum of its proper divisors (68857008).

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

30163440 is a wasteful number, since it uses less digits than its factorization.

30163440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426 (or 7420 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 30163440 is about 5492.1252716958. The cubic root of 30163440 is about 311.2865023882.

Adding to 30163440 its reverse (4436103), we get a palindrome (34599543).

It can be divided in two parts, 30163 and 440, that added together give a palindrome (30603).

The spelling of 30163440 in words is "thirty million, one hundred sixty-three thousand, four hundred forty".