30656741 has 4 divisors (see below), whose sum is σ = 31713900. Its totient is φ = 29599584.

The previous prime is 30656719. The next prime is 30656749. The reversal of 30656741 is 14765603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14765603 = 19 ⋅777137.

It can be written as a sum of positive squares in 2 ways, for example, as 7134241 + 23522500 = 2671^2 + 4850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30656741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30656698 and 30656707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30656749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528536 + ... + 528593.

It is an arithmetic number, because the mean of its divisors is an integer number (7928475).

Almost surely, 2^30656741 is an apocalyptic number.

It is an amenable number.

30656741 is a deficient number, since it is larger than the sum of its proper divisors (1057159).

30656741 is a wasteful number, since it uses less digits than its factorization.

30656741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057158.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 30656741 is about 5536.8529870315. The cubic root of 30656741 is about 312.9742890754.

The spelling of 30656741 in words is "thirty million, six hundred fifty-six thousand, seven hundred forty-one".