30642438 has 32 divisors (see below), whose sum is σ = 63737856. Its totient is φ = 9812448.

The previous prime is 30642431. The next prime is 30642439. The reversal of 30642438 is 83424603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30642431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17595 + ... + 19257.

It is an arithmetic number, because the mean of its divisors is an integer number (1991808).

Almost surely, 2^30642438 is an apocalyptic number.

30642438 is an abundant number, since it is smaller than the sum of its proper divisors (33095418).

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

30642438 is a wasteful number, since it uses less digits than its factorization.

30642438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 30642438 is about 5535.5612181603. The cubic root of 30642438 is about 312.9256084540.

The spelling of 30642438 in words is "thirty million, six hundred forty-two thousand, four hundred thirty-eight".