30328031 has 8 divisors (see below), whose sum is σ = 30999024. Its totient is φ = 29660800.

The previous prime is 30328027. The next prime is 30328037. The reversal of 30328031 is 13082303.

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

It is a cyclic number.

It is not a de Polignac number, because 30328031 - 2² = 30328027 is a prime.

It is a super-2 number, since 2×30328031² = 1839578928673922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30327994 and 30328012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30328037) 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, 20540 + ... + 21966.

It is an arithmetic number, because the mean of its divisors is an integer number (3874878).

Almost surely, 2^30328031 is an apocalyptic number.

30328031 is a deficient number, since it is larger than the sum of its proper divisors (670993).

30328031 is a wasteful number, since it uses less digits than its factorization.

30328031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30328031 is about 5507.0891585301. The cubic root of 30328031 is about 311.8516683416.

The spelling of 30328031 in words is "thirty million, three hundred twenty-eight thousand, thirty-one".