30286991 has 8 divisors (see below), whose sum is σ = 35807520. Its totient is φ = 25064928.

The previous prime is 30286973. The next prime is 30287011. The reversal of 30286991 is 19968203.

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

It is not a de Polignac number, because 30286991 - 2¹⁰ = 30285967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30286961) 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 7 ways as a sum of consecutive naturals, for example, 74396 + ... + 74801.

It is an arithmetic number, because the mean of its divisors is an integer number (4475940).

Almost surely, 2^30286991 is an apocalyptic number.

30286991 is a deficient number, since it is larger than the sum of its proper divisors (5520529).

30286991 is a wasteful number, since it uses less digits than its factorization.

30286991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149233.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 30286991 is about 5503.3617907603. The cubic root of 30286991 is about 311.7109385796.

The spelling of 30286991 in words is "thirty million, two hundred eighty-six thousand, nine hundred ninety-one".