30620665 has 8 divisors (see below), whose sum is σ = 38012040. Its totient is φ = 23651712.

The previous prime is 30620663. The next prime is 30620671. The reversal of 30620665 is 56602603.

It can be written as a sum of positive squares in 4 ways, for example, as 1590121 + 29030544 = 1261^2 + 5388^2 .

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 30620665 - 2¹ = 30620663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30620663) 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, 105444 + ... + 105733.

It is an arithmetic number, because the mean of its divisors is an integer number (4751505).

Almost surely, 2^30620665 is an apocalyptic number.

It is an amenable number.

30620665 is a deficient number, since it is larger than the sum of its proper divisors (7391375).

30620665 is a wasteful number, since it uses less digits than its factorization.

30620665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211211.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 30620665 is about 5533.5942207574. The cubic root of 30620665 is about 312.8514744088.

The spelling of 30620665 in words is "thirty million, six hundred twenty thousand, six hundred sixty-five".