30404220 has 96 divisors (see below), whose sum is σ = 106154496. Its totient is φ = 6316800.

The previous prime is 30404203. The next prime is 30404239. The reversal of 30404220 is 2240403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30404220.

It is a congruent number.

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, 1330 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (1105776).

Almost surely, 2^30404220 is an apocalyptic number.

30404220 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 30404220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53077248).

30404220 is an abundant number, since it is smaller than the sum of its proper divisors (75750276).

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

30404220 is a wasteful number, since it uses less digits than its factorization.

30404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611 (or 6609 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 30404220 is about 5514.0021762781. The cubic root of 30404220 is about 312.1125908571.

Adding to 30404220 its reverse (2240403), we get a palindrome (32644623).

It can be divided in two parts, 3040 and 4220, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 30404220 in words is "thirty million, four hundred four thousand, two hundred twenty".