30998130 has 16 divisors (see below), whose sum is σ = 74395584. Its totient is φ = 8266160.

The previous prime is 30998117. The next prime is 30998131. The reversal of 30998130 is 3189903.

It is a junction number, because it is equal to n+sod(n) for n = 30998091 and 30998100.

It is not an unprimeable number, because it can be changed into a prime (30998131) 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, 516606 + ... + 516665.

It is an arithmetic number, because the mean of its divisors is an integer number (4649724).

Almost surely, 2^30998130 is an apocalyptic number.

30998130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30998130 is an abundant number, since it is smaller than the sum of its proper divisors (43397454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30998130 is a wasteful number, since it uses less digits than its factorization.

30998130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033281.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 30998130 is about 5567.5964293400. The cubic root of 30998130 is about 314.1317485725.

The spelling of 30998130 in words is "thirty million, nine hundred ninety-eight thousand, one hundred thirty".