78033321 has 16 divisors (see below), whose sum is σ = 115989120. Its totient is φ = 51849360.

The previous prime is 78033313. The next prime is 78033377. The reversal of 78033321 is 12333087.

It is not a de Polignac number, because 78033321 - 2³ = 78033313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78033391) 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 15 ways as a sum of consecutive naturals, for example, 3751 + ... + 13043.

It is an arithmetic number, because the mean of its divisors is an integer number (7249320).

Almost surely, 2^78033321 is an apocalyptic number.

It is an amenable number.

78033321 is a deficient number, since it is larger than the sum of its proper divisors (37955799).

78033321 is a wasteful number, since it uses less digits than its factorization.

78033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613 (or 9607 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 78033321 is about 8833.6470950565. The cubic root of 78033321 is about 427.3267010722.

The spelling of 78033321 in words is "seventy-eight million, thirty-three thousand, three hundred twenty-one".