30120540 has 48 divisors (see below), whose sum is σ = 84577920. Its totient is φ = 8009280.

The previous prime is 30120533. The next prime is 30120551. The reversal of 30120540 is 4502103.

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

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, 36735 + ... + 37545.

It is an arithmetic number, because the mean of its divisors is an integer number (1762040).

Almost surely, 2^30120540 is an apocalyptic number.

30120540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30120540 is an abundant number, since it is smaller than the sum of its proper divisors (54457380).

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

30120540 is a wasteful number, since it uses less digits than its factorization.

30120540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30120540 is about 5488.2182901193. The cubic root of 30120540 is about 311.1388564636.

Adding to 30120540 its reverse (4502103), we get a palindrome (34622643).

The spelling of 30120540 in words is "thirty million, one hundred twenty thousand, five hundred forty".