30386021 has 8 divisors (see below), whose sum is σ = 32241240. Its totient is φ = 28538368.

The previous prime is 30386011. The next prime is 30386033. The reversal of 30386021 is 12068303.

It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 27196225 = 1786^2 + 5215^2 .

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 30386021 - 2²² = 26191717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30386011) 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, 7865 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (4030155).

Almost surely, 2^30386021 is an apocalyptic number.

It is an amenable number.

30386021 is a deficient number, since it is larger than the sum of its proper divisors (1855219).

30386021 is a wasteful number, since it uses less digits than its factorization.

30386021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30386021 is about 5512.3516760091. The cubic root of 30386021 is about 312.0503048681.

The spelling of 30386021 in words is "thirty million, three hundred eighty-six thousand, twenty-one".