30308642 has 32 divisors (see below), whose sum is σ = 56267904. Its totient is φ = 11923200.

The previous prime is 30308639. The next prime is 30308657. The reversal of 30308642 is 24680303.

It is a super-2 number, since 2×30308642² = 1837227559768328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43517 + ... + 44207.

It is an arithmetic number, because the mean of its divisors is an integer number (1758372).

Almost surely, 2^30308642 is an apocalyptic number.

30308642 is a deficient number, since it is larger than the sum of its proper divisors (25959262).

30308642 is a wasteful number, since it uses less digits than its factorization.

30308642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 30308642 is about 5505.3285097258. The cubic root of 30308642 is about 311.7851975907.

Adding to 30308642 its reverse (24680303), we get a palindrome (54988945).

The spelling of 30308642 in words is "thirty million, three hundred eight thousand, six hundred forty-two".