78033928 has 32 divisors (see below), whose sum is σ = 167673600. Its totient is φ = 33351552.

The previous prime is 78033847. The next prime is 78033929. The reversal of 78033928 is 82933087.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78033929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21201 + ... + 24607.

It is an arithmetic number, because the mean of its divisors is an integer number (5239800).

Almost surely, 2^78033928 is an apocalyptic number.

It is an amenable number.

78033928 is an abundant number, since it is smaller than the sum of its proper divisors (89639672).

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

78033928 is a wasteful number, since it uses less digits than its factorization.

78033928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3825 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78033928 is about 8833.6814522599. The cubic root of 78033928 is about 427.3278090888.

It can be divided in two parts, 78033 and 928, that added together give a square (78961 = 281²).

The spelling of 78033928 in words is "seventy-eight million, thirty-three thousand, nine hundred twenty-eight".