30930642 has 12 divisors (see below), whose sum is σ = 67016430. Its totient is φ = 10310208.

The previous prime is 30930637. The next prime is 30930643. The reversal of 30930642 is 24603903.

It can be written as a sum of positive squares in only one way, i.e., 29582721 + 1347921 = 5439^2 + 1161^2 .

It is a super-2 number, since 2×30930642² = 1913409229064328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30930643) 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 5 ways as a sum of consecutive naturals, for example, 859167 + ... + 859202.

Almost surely, 2^30930642 is an apocalyptic number.

30930642 is an abundant number, since it is smaller than the sum of its proper divisors (36085788).

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

30930642 is a wasteful number, since it uses less digits than its factorization.

30930642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718377 (or 1718374 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 30930642 is about 5561.5323427991. The cubic root of 30930642 is about 313.9036108595.

The spelling of 30930642 in words is "thirty million, nine hundred thirty thousand, six hundred forty-two".