30555828 has 36 divisors (see below), whose sum is σ = 78886080. Its totient is φ = 9968016.

The previous prime is 30555827. The next prime is 30555839. The reversal of 30555828 is 82855503.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30555792 and 30555801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30555827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7338 + ... + 10721.

It is an arithmetic number, because the mean of its divisors is an integer number (2191280).

Almost surely, 2^30555828 is an apocalyptic number.

It is an amenable number.

30555828 is an abundant number, since it is smaller than the sum of its proper divisors (48330252).

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

30555828 is a wasteful number, since it uses less digits than its factorization.

30555828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18116 (or 18111 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 30555828 is about 5527.7326273980. The cubic root of 30555828 is about 312.6305050647.

The spelling of 30555828 in words is "thirty million, five hundred fifty-five thousand, eight hundred twenty-eight".