30312989 has 8 divisors (see below), whose sum is σ = 36681408. Its totient is φ = 24454080.

The previous prime is 30312983. The next prime is 30313001. The reversal of 30312989 is 98921303.

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

It is not a de Polignac number, because 30312989 - 2¹² = 30308893 is a prime.

It is a super-2 number, since 2×30312989² = 1837754604228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312983) 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, 127247 + ... + 127484.

It is an arithmetic number, because the mean of its divisors is an integer number (4585176).

Almost surely, 2^30312989 is an apocalyptic number.

It is an amenable number.

30312989 is a deficient number, since it is larger than the sum of its proper divisors (6368419).

30312989 is a wasteful number, since it uses less digits than its factorization.

30312989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254755.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 30312989 is about 5505.7232948996. The cubic root of 30312989 is about 311.8001027505.

The spelling of 30312989 in words is "thirty million, three hundred twelve thousand, nine hundred eighty-nine".