30538740 has 48 divisors (see below), whose sum is σ = 88462080. Its totient is φ = 7862400.

The previous prime is 30538709. The next prime is 30538741. The reversal of 30538740 is 4783503.

It is a super-2 number, since 2×30538740² = 1865229281575200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30538698 and 30538707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30538741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7036 + ... + 10515.

It is an arithmetic number, because the mean of its divisors is an integer number (1842960).

Almost surely, 2^30538740 is an apocalyptic number.

30538740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30538740 is an abundant number, since it is smaller than the sum of its proper divisors (57923340).

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

30538740 is a wasteful number, since it uses less digits than its factorization.

30538740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17592 (or 17590 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 30538740 is about 5526.1867503732. The cubic root of 30538740 is about 312.5722158436.

The spelling of 30538740 in words is "thirty million, five hundred thirty-eight thousand, seven hundred forty".