30113520 has 80 divisors (see below), whose sum is σ = 93898752. Its totient is φ = 7983360.

The previous prime is 30113519. The next prime is 30113533. The reversal of 30113520 is 2531103.

It is a happy number.

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

It is a super-3 number, since 3×30113520³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30113520.

It is a congruent number.

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, 64809 + ... + 65271.

Almost surely, 2^30113520 is an apocalyptic number.

30113520 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 30113520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46949376).

30113520 is an abundant number, since it is smaller than the sum of its proper divisors (63785232).

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

30113520 is a wasteful number, since it uses less digits than its factorization.

30113520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 30113520 is about 5487.5787010302. The cubic root of 30113520 is about 311.1146828766.

Adding to 30113520 its reverse (2531103), we get a palindrome (32644623).

The spelling of 30113520 in words is "thirty million, one hundred thirteen thousand, five hundred twenty".