30998385 has 36 divisors (see below), whose sum is σ = 59069556. Its totient is φ = 15026880.

The previous prime is 30998371. The next prime is 30998437. The reversal of 30998385 is 58389903.

It can be written as a sum of positive squares in 2 ways, for example, as 7144929 + 23853456 = 2673^2 + 4884^2 .

It is not a de Polignac number, because 30998385 - 2⁴ = 30998369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 30998385.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 2599 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (1640821).

Almost surely, 2^30998385 is an apocalyptic number.

It is an amenable number.

30998385 is a deficient number, since it is larger than the sum of its proper divisors (28071171).

30998385 is a wasteful number, since it uses less digits than its factorization.

30998385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726 (or 5712 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 30998385 is about 5567.6193296597. The cubic root of 30998385 is about 314.1326099511.

The spelling of 30998385 in words is "thirty million, nine hundred ninety-eight thousand, three hundred eighty-five".