78928850 has 192 divisors, whose sum is σ = 209986560. Its totient is φ = 21254400.

The previous prime is 78928799. The next prime is 78928853. The reversal of 78928850 is 5882987.

It is a junction number, because it is equal to n+sod(n) for n = 78928795 and 78928804.

It is not an unprimeable number, because it can be changed into a prime (78928853) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 950909 + ... + 950991.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^78928850 is an apocalyptic number.

78928850 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78928850 is an abundant number, since it is smaller than the sum of its proper divisors (131057710).

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

78928850 is a wasteful number, since it uses less digits than its factorization.

78928850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 78928850 is about 8884.1910155061. The cubic root of 78928850 is about 428.9551882745.

The spelling of 78928850 in words is "seventy-eight million, nine hundred twenty-eight thousand, eight hundred fifty".