30198420 has 120 divisors (see below), whose sum is σ = 108307584. Its totient is φ = 6899904.

The previous prime is 30198419. The next prime is 30198439. The reversal of 30198420 is 2489103.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10009 + ... + 12671.

Almost surely, 2^30198420 is an apocalyptic number.

30198420 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 30198420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54153792).

30198420 is an abundant number, since it is smaller than the sum of its proper divisors (78109164).

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

30198420 is a wasteful number, since it uses less digits than its factorization.

30198420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691 (or 2680 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30198420 is about 5495.3089085146. The cubic root of 30198420 is about 311.4067870262.

The spelling of 30198420 in words is "thirty million, one hundred ninety-eight thousand, four hundred twenty".