30456820 has 12 divisors (see below), whose sum is σ = 63959364. Its totient is φ = 12182720.

The previous prime is 30456781. The next prime is 30456847. The reversal of 30456820 is 2865403.

It can be written as a sum of positive squares in 2 ways, for example, as 14424804 + 16032016 = 3798^2 + 4004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761401 + ... + 761440.

It is an arithmetic number, because the mean of its divisors is an integer number (5329947).

Almost surely, 2^30456820 is an apocalyptic number.

It is an amenable number.

30456820 is an abundant number, since it is smaller than the sum of its proper divisors (33502544).

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

30456820 is a wasteful number, since it uses less digits than its factorization.

30456820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522850 (or 1522848 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 30456820 is about 5518.7697904515. The cubic root of 30456820 is about 312.2924744833.

The spelling of 30456820 in words is "thirty million, four hundred fifty-six thousand, eight hundred twenty".