30078828 has 36 divisors (see below), whose sum is σ = 81882528. Its totient is φ = 9254880.

The previous prime is 30078823. The next prime is 30078833. The reversal of 30078828 is 82887003.

It is an interprime number because it is at equal distance from previous prime (30078823) and next prime (30078833).

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 = 30078792 and 30078801.

It is not an unprimeable number, because it can be changed into a prime (30078823) 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, 31668 + ... + 32603.

Almost surely, 2^30078828 is an apocalyptic number.

It is an amenable number.

30078828 is an abundant number, since it is smaller than the sum of its proper divisors (51803700).

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

30078828 is a wasteful number, since it uses less digits than its factorization.

30078828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64294 (or 64289 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 30078828 is about 5484.4168331738. The cubic root of 30078828 is about 310.9951647115.

The spelling of 30078828 in words is "thirty million, seventy-eight thousand, eight hundred twenty-eight".