78928455 has 16 divisors (see below), whose sum is σ = 127125504. Its totient is φ = 41815200.

The previous prime is 78928441. The next prime is 78928469. The reversal of 78928455 is 55482987.

It is an interprime number because it is at equal distance from previous prime (78928441) and next prime (78928469).

It is not a de Polignac number, because 78928455 - 2⁶ = 78928391 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 15159 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (7945344).

Almost surely, 2^78928455 is an apocalyptic number.

78928455 is a deficient number, since it is larger than the sum of its proper divisors (48197049).

78928455 is a wasteful number, since it uses less digits than its factorization.

78928455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35006.

The product of its digits is 806400, while the sum is 48.

The square root of 78928455 is about 8884.1687849793. The cubic root of 78928455 is about 428.9544727035.

The spelling of 78928455 in words is "seventy-eight million, nine hundred twenty-eight thousand, four hundred fifty-five".