30479985 has 12 divisors (see below), whose sum is σ = 52832052. Its totient is φ = 16255968.

The previous prime is 30479983. The next prime is 30479987. The reversal of 30479985 is 58997403.

It is an interprime number because it is at equal distance from previous prime (30479983) and next prime (30479987).

It can be written as a sum of positive squares in 2 ways, for example, as 24324624 + 6155361 = 4932^2 + 2481^2 .

It is not a de Polignac number, because 30479985 - 2¹ = 30479983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 677333 = 30479985 / (3 + 0 + 4 + 7 + 9 + 9 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30479985.

It is not an unprimeable number, because it can be changed into a prime (30479983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 338622 + ... + 338711.

It is an arithmetic number, because the mean of its divisors is an integer number (4402671).

Almost surely, 2^30479985 is an apocalyptic number.

It is an amenable number.

30479985 is a deficient number, since it is larger than the sum of its proper divisors (22352067).

30479985 is a wasteful number, since it uses less digits than its factorization.

30479985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677344 (or 677341 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 30479985 is about 5520.8681382551. The cubic root of 30479985 is about 312.3716294077.

The spelling of 30479985 in words is "thirty million, four hundred seventy-nine thousand, nine hundred eighty-five".