30355828 has 6 divisors (see below), whose sum is σ = 53122706. Its totient is φ = 15177912.

The previous prime is 30355823. The next prime is 30355847. The reversal of 30355828 is 82855303.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 14531344 = 3978^2 + 3812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30355793 and 30355802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30355823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3794475 + ... + 3794482.

Almost surely, 2^30355828 is an apocalyptic number.

It is an amenable number.

30355828 is a deficient number, since it is larger than the sum of its proper divisors (22766878).

30355828 is a wasteful number, since it uses less digits than its factorization.

30355828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7588961 (or 7588959 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 30355828 is about 5509.6123275599. The cubic root of 30355828 is about 311.9469145931.

The spelling of 30355828 in words is "thirty million, three hundred fifty-five thousand, eight hundred twenty-eight".