30047142 has 16 divisors (see below), whose sum is σ = 60194160. Its totient is φ = 9999072.

The previous prime is 30047123. The next prime is 30047167. The reversal of 30047142 is 24174003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 7752.

It is an arithmetic number, because the mean of its divisors is an integer number (3762135).

Almost surely, 2^30047142 is an apocalyptic number.

30047142 is an abundant number, since it is smaller than the sum of its proper divisors (30147018).

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

30047142 is a wasteful number, since it uses less digits than its factorization.

30047142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 30047142 is about 5481.5273419002. The cubic root of 30047142 is about 310.8859222564.

The spelling of 30047142 in words is "thirty million, forty-seven thousand, one hundred forty-two".