30540820 has 12 divisors (see below), whose sum is σ = 64135764. Its totient is φ = 12216320.

The previous prime is 30540817. The next prime is 30540877. The reversal of 30540820 is 2804503.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 18679684 = 3444^2 + 4322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30540791 and 30540800.

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, 763501 + ... + 763540.

It is an arithmetic number, because the mean of its divisors is an integer number (5344647).

Almost surely, 2^30540820 is an apocalyptic number.

It is an amenable number.

30540820 is an abundant number, since it is smaller than the sum of its proper divisors (33594944).

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

30540820 is a wasteful number, since it uses less digits than its factorization.

30540820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527050 (or 1527048 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 30540820 is about 5526.3749420393. The cubic root of 30540820 is about 312.5793121356.

The spelling of 30540820 in words is "thirty million, five hundred forty thousand, eight hundred twenty".