30142906 has 8 divisors (see below), whose sum is σ = 45955764. Its totient is φ = 14824320.

The previous prime is 30142883. The next prime is 30142907. The reversal of 30142906 is 60924103.

It can be written as a sum of positive squares in 2 ways, for example, as 29975625 + 167281 = 5475^2 + 409^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30142907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123415 + ... + 123658.

Almost surely, 2^30142906 is an apocalyptic number.

30142906 is a deficient number, since it is larger than the sum of its proper divisors (15812858).

30142906 is a wasteful number, since it uses less digits than its factorization.

30142906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247136.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30142906 is about 5490.2555496079. The cubic root of 30142906 is about 311.2158494383.

The spelling of 30142906 in words is "thirty million, one hundred forty-two thousand, nine hundred six".