30072987 has 24 divisors (see below), whose sum is σ = 49791456. Its totient is φ = 17133696.

The previous prime is 30072979. The next prime is 30072989. The reversal of 30072987 is 78927003.

It is not a de Polignac number, because 30072987 - 2³ = 30072979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30072989) 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 23 ways as a sum of consecutive naturals, for example, 34663 + ... + 35519.

It is an arithmetic number, because the mean of its divisors is an integer number (2074644).

Almost surely, 2^30072987 is an apocalyptic number.

30072987 is a deficient number, since it is larger than the sum of its proper divisors (19718469).

30072987 is a wasteful number, since it uses less digits than its factorization.

30072987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 30072987 is about 5483.8842985606. The cubic root of 30072987 is about 310.9750327175.

The spelling of 30072987 in words is "thirty million, seventy-two thousand, nine hundred eighty-seven".