30124440 has 64 divisors (see below), whose sum is σ = 100418400. Its totient is φ = 8032896.

The previous prime is 30124433. The next prime is 30124477. The reversal of 30124440 is 4442103.

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 15 ways as a sum of consecutive naturals, for example, 12867 + ... + 15026.

Almost surely, 2^30124440 is an apocalyptic number.

30124440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30124440 is an abundant number, since it is smaller than the sum of its proper divisors (70293960).

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

30124440 is a wasteful number, since it uses less digits than its factorization.

30124440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27913 (or 27903 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30124440 is about 5488.5735851859. The cubic root of 30124440 is about 311.1522846112.

Adding to 30124440 its reverse (4442103), we get a palindrome (34566543).

The spelling of 30124440 in words is "thirty million, one hundred twenty-four thousand, four hundred forty".