30255820 has 24 divisors (see below), whose sum is σ = 72614304. Its totient is φ = 10373376.

The previous prime is 30255781. The next prime is 30255821. The reversal of 30255820 is 2855203.

It is not an unprimeable number, because it can be changed into a prime (30255821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107917 + ... + 108196.

It is an arithmetic number, because the mean of its divisors is an integer number (3025596).

Almost surely, 2^30255820 is an apocalyptic number.

It is an amenable number.

30255820 is an abundant number, since it is smaller than the sum of its proper divisors (42358484).

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

30255820 is a wasteful number, since it uses less digits than its factorization.

30255820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216129 (or 216127 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 30255820 is about 5500.5290654627. The cubic root of 30255820 is about 311.6039655133.

The spelling of 30255820 in words is "thirty million, two hundred fifty-five thousand, eight hundred twenty".