30715989 has 8 divisors (see below), whose sum is σ = 43110240. Its totient is φ = 19399536.

The previous prime is 30715987. The next prime is 30716003. The reversal of 30715989 is 98951703.

It is a happy number.

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

It is not a de Polignac number, because 30715989 - 2¹ = 30715987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30715989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30715981) 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, 269382 + ... + 269495.

It is an arithmetic number, because the mean of its divisors is an integer number (5388780).

Almost surely, 2^30715989 is an apocalyptic number.

It is an amenable number.

30715989 is a deficient number, since it is larger than the sum of its proper divisors (12394251).

30715989 is a wasteful number, since it uses less digits than its factorization.

30715989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538899.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 30715989 is about 5542.2007361697. The cubic root of 30715989 is about 313.1757800283.

The spelling of 30715989 in words is "thirty million, seven hundred fifteen thousand, nine hundred eighty-nine".