30452420 has 48 divisors (see below), whose sum is σ = 65881200. Its totient is φ = 11819520.

The previous prime is 30452419. The next prime is 30452489. The reversal of 30452420 is 2425403.

It can be written as a sum of positive squares in 8 ways, for example, as 4096 + 30448324 = 64^2 + 5518^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30452392 and 30452401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132866 + ... + 133094.

It is an arithmetic number, because the mean of its divisors is an integer number (1372525).

Almost surely, 2^30452420 is an apocalyptic number.

It is an amenable number.

30452420 is an abundant number, since it is smaller than the sum of its proper divisors (35428780).

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

30452420 is a wasteful number, since it uses less digits than its factorization.

30452420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 30452420 is about 5518.3711364858. The cubic root of 30452420 is about 312.2774351252.

Adding to 30452420 its reverse (2425403), we get a palindrome (32877823).

The spelling of 30452420 in words is "thirty million, four hundred fifty-two thousand, four hundred twenty".