30490020 has 240 divisors, whose sum is σ = 109771200. Its totient is φ = 7015680.

The previous prime is 30490013. The next prime is 30490037. The reversal of 30490020 is 2009403.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30489975 and 30490002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 516751 + ... + 516809.

It is an arithmetic number, because the mean of its divisors is an integer number (457380).

Almost surely, 2^30490020 is an apocalyptic number.

30490020 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 30490020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54885600).

30490020 is an abundant number, since it is smaller than the sum of its proper divisors (79281180).

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

30490020 is a wasteful number, since it uses less digits than its factorization.

30490020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30490020 is about 5521.7768879229. The cubic root of 30490020 is about 312.4059066048.

Adding to 30490020 its reverse (2009403), we get a palindrome (32499423).

The spelling of 30490020 in words is "thirty million, four hundred ninety thousand, twenty".