30219985 has 8 divisors (see below), whose sum is σ = 36423720. Its totient is φ = 24069504.

The previous prime is 30219983. The next prime is 30220007. The reversal of 30219985 is 58991203.

It can be written as a sum of positive squares in 4 ways, for example, as 8242641 + 21977344 = 2871^2 + 4688^2 .

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 30219985 - 2¹ = 30219983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30219983) 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, 12052 + ... + 14341.

It is an arithmetic number, because the mean of its divisors is an integer number (4552965).

Almost surely, 2^30219985 is an apocalyptic number.

It is an amenable number.

30219985 is a deficient number, since it is larger than the sum of its proper divisors (6203735).

30219985 is a wasteful number, since it uses less digits than its factorization.

30219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26627.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 30219985 is about 5497.2706864407. The cubic root of 30219985 is about 311.4808956436.

The spelling of 30219985 in words is "thirty million, two hundred nineteen thousand, nine hundred eighty-five".