30998100 has 144 divisors (see below), whose sum is σ = 106243200. Its totient is φ = 6827520.

The previous prime is 30998083. The next prime is 30998111. The reversal of 30998100 is 189903.

It is a happy number.

It is a super-2 number, since 2×30998100² = 1921764407220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60646 + ... + 61154.

It is an arithmetic number, because the mean of its divisors is an integer number (737800).

Almost surely, 2^30998100 is an apocalyptic number.

30998100 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 30998100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53121600).

30998100 is an abundant number, since it is smaller than the sum of its proper divisors (75245100).

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

30998100 is a wasteful number, since it uses less digits than its factorization.

30998100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 30998100 is about 5567.5937351786. The cubic root of 30998100 is about 314.1316472336.

The spelling of 30998100 in words is "thirty million, nine hundred ninety-eight thousand, one hundred".