78928153 has 4 divisors (see below), whose sum is σ = 79451008. Its totient is φ = 78405300.

The previous prime is 78928151. The next prime is 78928193. The reversal of 78928153 is 35182987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78928153 - 2¹ = 78928151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78928151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261201 + ... + 261502.

It is an arithmetic number, because the mean of its divisors is an integer number (19862752).

Almost surely, 2^78928153 is an apocalyptic number.

It is an amenable number.

78928153 is a deficient number, since it is larger than the sum of its proper divisors (522855).

78928153 is a wasteful number, since it uses less digits than its factorization.

78928153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522854.

The product of its digits is 120960, while the sum is 43.

The square root of 78928153 is about 8884.1517884377. The cubic root of 78928153 is about 428.9539256071.

The spelling of 78928153 in words is "seventy-eight million, nine hundred twenty-eight thousand, one hundred fifty-three".