30542138 has 8 divisors (see below), whose sum is σ = 49978080. Its totient is φ = 13882780.

The previous prime is 30542123. The next prime is 30542147. The reversal of 30542138 is 83124503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×30542138² = 1865644387222088, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 694118 + ... + 694161.

It is an arithmetic number, because the mean of its divisors is an integer number (6247260).

Almost surely, 2^30542138 is an apocalyptic number.

30542138 is a deficient number, since it is larger than the sum of its proper divisors (19435942).

30542138 is a wasteful number, since it uses less digits than its factorization.

30542138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388292.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 30542138 is about 5526.4941870955. The cubic root of 30542138 is about 312.5838085616.

The spelling of 30542138 in words is "thirty million, five hundred forty-two thousand, one hundred thirty-eight".