30403020 has 96 divisors (see below), whose sum is σ = 89449920. Its totient is φ = 7705600.

The previous prime is 30403013. The next prime is 30403039. The reversal of 30403020 is 2030403.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30402987 and 30403005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175654 + ... + 175826.

It is an arithmetic number, because the mean of its divisors is an integer number (931770).

Almost surely, 2^30403020 is an apocalyptic number.

30403020 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 30403020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44724960).

30403020 is an abundant number, since it is smaller than the sum of its proper divisors (59046900).

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

30403020 is a wasteful number, since it uses less digits than its factorization.

30403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 30403020 is about 5513.8933613192. The cubic root of 30403020 is about 312.1084846285.

Adding to 30403020 its reverse (2030403), we get a palindrome (32433423).

The spelling of 30403020 in words is "thirty million, four hundred three thousand, twenty".