30542642 has 32 divisors (see below), whose sum is σ = 53488512. Its totient is φ = 12950784.

The previous prime is 30542641. The next prime is 30542669. The reversal of 30542642 is 24624503.

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

It is not an unprimeable number, because it can be changed into a prime (30542641) 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, 18203 + ... + 19809.

It is an arithmetic number, because the mean of its divisors is an integer number (1671516).

Almost surely, 2^30542642 is an apocalyptic number.

30542642 is a deficient number, since it is larger than the sum of its proper divisors (22945870).

30542642 is a wasteful number, since it uses less digits than its factorization.

30542642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 30542642 is about 5526.5397854354. The cubic root of 30542642 is about 312.5855279498.

The spelling of 30542642 in words is "thirty million, five hundred forty-two thousand, six hundred forty-two".