30998160 has 160 divisors (see below), whose sum is σ = 108564480. Its totient is φ = 8128512.

The previous prime is 30998131. The next prime is 30998161. The reversal of 30998160 is 6189903.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30998161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244017 + ... + 244143.

It is an arithmetic number, because the mean of its divisors is an integer number (678528).

Almost surely, 2^30998160 is an apocalyptic number.

30998160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30998160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54282240).

30998160 is an abundant number, since it is smaller than the sum of its proper divisors (77566320).

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

30998160 is a wasteful number, since it uses less digits than its factorization.

30998160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 30998160 is about 5567.5991235002. The cubic root of 30998160 is about 314.1318499114.

The spelling of 30998160 in words is "thirty million, nine hundred ninety-eight thousand, one hundred sixty".