30142956 has 24 divisors (see below), whose sum is σ = 70608384. Its totient is φ = 10008400.

The previous prime is 30142951. The next prime is 30142993. The reversal of 30142956 is 65924103.

It is not an unprimeable number, because it can be changed into a prime (30142951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (2942016).

Almost surely, 2^30142956 is an apocalyptic number.

It is an amenable number.

30142956 is an abundant number, since it is smaller than the sum of its proper divisors (40465428).

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

30142956 is a wasteful number, since it uses less digits than its factorization.

30142956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821 (or 9819 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 30142956 is about 5490.2601031281. The cubic root of 30142956 is about 311.2160215162.

The spelling of 30142956 in words is "thirty million, one hundred forty-two thousand, nine hundred fifty-six".