30690815 has 8 divisors (see below), whose sum is σ = 37348128. Its totient is φ = 24206560.

The previous prime is 30690799. The next prime is 30690817. The reversal of 30690815 is 51809603.

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

It is not a de Polignac number, because 30690815 - 2⁴ = 30690799 is a prime.

It is a super-2 number, since 2×30690815² = 1883852250728450, 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 (30690817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42872 + ... + 43581.

It is an arithmetic number, because the mean of its divisors is an integer number (4668516).

Almost surely, 2^30690815 is an apocalyptic number.

30690815 is a deficient number, since it is larger than the sum of its proper divisors (6657313).

30690815 is an equidigital number, since it uses as much as digits as its factorization.

30690815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86529.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 30690815 is about 5539.9291511715. The cubic root of 30690815 is about 313.0901998236.

The spelling of 30690815 in words is "thirty million, six hundred ninety thousand, eight hundred fifteen".