30400420 has 24 divisors (see below), whose sum is σ = 67596984. Its totient is φ = 11444736.

The previous prime is 30400417. The next prime is 30400423. The reversal of 30400420 is 2400403.

It is an interprime number because it is at equal distance from previous prime (30400417) and next prime (30400423).

It can be written as a sum of positive squares in 4 ways, for example, as 5560164 + 24840256 = 2358^2 + 4984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30400420.

It is not an unprimeable number, because it can be changed into a prime (30400423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44367 + ... + 45046.

It is an arithmetic number, because the mean of its divisors is an integer number (2816541).

Almost surely, 2^30400420 is an apocalyptic number.

It is an amenable number.

30400420 is an abundant number, since it is smaller than the sum of its proper divisors (37196564).

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

30400420 is a wasteful number, since it uses less digits than its factorization.

30400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89439 (or 89437 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 30400420 is about 5513.6575882077. The cubic root of 30400420 is about 312.0995874291.

Adding to 30400420 its reverse (2400403), we get a palindrome (32800823).

The spelling of 30400420 in words is "thirty million, four hundred thousand, four hundred twenty".