30185740 has 24 divisors (see below), whose sum is σ = 68266800. Its totient is φ = 11145408.

The previous prime is 30185681. The next prime is 30185759. The reversal of 30185740 is 4758103.

It is a super-2 number, since 2×30185740² = 1822357798695200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30185699 and 30185708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57790 + ... + 58309.

It is an arithmetic number, because the mean of its divisors is an integer number (2844450).

Almost surely, 2^30185740 is an apocalyptic number.

It is an amenable number.

30185740 is an abundant number, since it is smaller than the sum of its proper divisors (38081060).

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

30185740 is a wasteful number, since it uses less digits than its factorization.

30185740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116121 (or 116119 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 30185740 is about 5494.1550760786. The cubic root of 30185740 is about 311.3631954425.

The spelling of 30185740 in words is "thirty million, one hundred eighty-five thousand, seven hundred forty".