78030828 has 36 divisors (see below), whose sum is σ = 199748640. Its totient is φ = 25680096.

The previous prime is 78030809. The next prime is 78030829. The reversal of 78030828 is 82803087.

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 = 78030792 and 78030801.

It is not an unprimeable number, because it can be changed into a prime (78030829) 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, 10875 + ... + 16562.

Almost surely, 2^78030828 is an apocalyptic number.

It is an amenable number.

78030828 is an abundant number, since it is smaller than the sum of its proper divisors (121717812).

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

78030828 is a wasteful number, since it uses less digits than its factorization.

78030828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27526 (or 27521 counting only the distinct ones).

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

The square root of 78030828 is about 8833.5059857341. The cubic root of 78030828 is about 427.3221502949.

The spelling of 78030828 in words is "seventy-eight million, thirty thousand, eight hundred twenty-eight".