30542140 has 12 divisors (see below), whose sum is σ = 64138536. Its totient is φ = 12216848.

The previous prime is 30542123. The next prime is 30542147. The reversal of 30542140 is 4124503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30542147) 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 3 ways as a sum of consecutive naturals, for example, 763534 + ... + 763573.

It is an arithmetic number, because the mean of its divisors is an integer number (5344878).

Almost surely, 2^30542140 is an apocalyptic number.

It is an amenable number.

30542140 is an abundant number, since it is smaller than the sum of its proper divisors (33596396).

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

30542140 is a wasteful number, since it uses less digits than its factorization.

30542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527116 (or 1527114 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30542140 is about 5526.4943680420. The cubic root of 30542140 is about 312.5838153846.

Adding to 30542140 its reverse (4124503), we get a palindrome (34666643).

The spelling of 30542140 in words is "thirty million, five hundred forty-two thousand, one hundred forty".