30428687 has 2 divisors, whose sum is σ = 30428688. Its totient is φ = 30428686.

The previous prime is 30428621. The next prime is 30428729. The reversal of 30428687 is 78682403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30428687 - 2¹² = 30424591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30428687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30428087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15214343 + 15214344.

It is an arithmetic number, because the mean of its divisors is an integer number (15214344).

Almost surely, 2^30428687 is an apocalyptic number.

30428687 is a deficient number, since it is larger than the sum of its proper divisors (1).

30428687 is an equidigital number, since it uses as much as digits as its factorization.

30428687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 30428687 is about 5516.2203545544. The cubic root of 30428687 is about 312.1962898882.

The spelling of 30428687 in words is "thirty million, four hundred twenty-eight thousand, six hundred eighty-seven".