30684968 has 8 divisors (see below), whose sum is σ = 57534330. Its totient is φ = 15342480.

The previous prime is 30684961. The next prime is 30685003. The reversal of 30684968 is 86948603.

It can be written as a sum of positive squares in only one way, i.e., 21696964 + 8988004 = 4658^2 + 2998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×30684968² = 1883134522322048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30684961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1917803 + ... + 1917818.

Almost surely, 2^30684968 is an apocalyptic number.

It is an amenable number.

30684968 is a deficient number, since it is larger than the sum of its proper divisors (26849362).

30684968 is a wasteful number, since it uses less digits than its factorization.

30684968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835627 (or 3835623 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 30684968 is about 5539.4014117051. The cubic root of 30684968 is about 313.0703159738.

The spelling of 30684968 in words is "thirty million, six hundred eighty-four thousand, nine hundred sixty-eight".