30252240 has 60 divisors (see below), whose sum is σ = 101599524. Its totient is φ = 8067072.

The previous prime is 30252239. The next prime is 30252251. The reversal of 30252240 is 4225203.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 23155344 = 2664^2 + 4812^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20289 + ... + 21728.

Almost surely, 2^30252240 is an apocalyptic number.

30252240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30252240 is an abundant number, since it is smaller than the sum of its proper divisors (71347284).

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

30252240 is a wasteful number, since it uses less digits than its factorization.

30252240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42036 (or 42027 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 30252240 is about 5500.2036325940. The cubic root of 30252240 is about 311.5916749171.

Adding to 30252240 its reverse (4225203), we get a palindrome (34477443).

The spelling of 30252240 in words is "thirty million, two hundred fifty-two thousand, two hundred forty".