30157986 has 16 divisors (see below), whose sum is σ = 60417504. Its totient is φ = 10035744.

The previous prime is 30157969. The next prime is 30158021. The reversal of 30157986 is 68975103.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (3776094).

Almost surely, 2^30157986 is an apocalyptic number.

30157986 is an abundant number, since it is smaller than the sum of its proper divisors (30259518).

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

30157986 is a wasteful number, since it uses less digits than its factorization.

30157986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 30157986 is about 5491.6287201522. The cubic root of 30157986 is about 311.2677395092.

The spelling of 30157986 in words is "thirty million, one hundred fifty-seven thousand, nine hundred eighty-six".