78331028 has 24 divisors (see below), whose sum is σ = 139372800. Its totient is φ = 38514528.

The previous prime is 78331027. The next prime is 78331039. The reversal of 78331028 is 82013387.

It is a super-2 number, since 2×78331028² = 12271499895073568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78330985 and 78331003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78331021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153638 + ... + 154146.

It is an arithmetic number, because the mean of its divisors is an integer number (5807200).

Almost surely, 2^78331028 is an apocalyptic number.

It is an amenable number.

78331028 is a deficient number, since it is larger than the sum of its proper divisors (61041772).

78331028 is a wasteful number, since it uses less digits than its factorization.

78331028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 78331028 is about 8850.4817947951. The cubic root of 78331028 is about 427.8694465992.

The spelling of 78331028 in words is "seventy-eight million, three hundred thirty-one thousand, twenty-eight".