30142856 has 16 divisors (see below), whose sum is σ = 56816640. Its totient is φ = 14991760.

The previous prime is 30142843. The next prime is 30142859. The reversal of 30142856 is 65824103.

It is not an unprimeable number, because it can be changed into a prime (30142859) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8336 + ... + 11391.

It is an arithmetic number, because the mean of its divisors is an integer number (3551040).

Almost surely, 2^30142856 is an apocalyptic number.

It is an amenable number.

30142856 is a deficient number, since it is larger than the sum of its proper divisors (26673784).

30142856 is a wasteful number, since it uses less digits than its factorization.

30142856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19924 (or 19920 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30142856 is about 5490.2509960839. The cubic root of 30142856 is about 311.2156773602.

Adding to 30142856 its reverse (65824103), we get a palindrome (95966959).

The spelling of 30142856 in words is "thirty million, one hundred forty-two thousand, eight hundred fifty-six".