78698256 has 160 divisors (see below), whose sum is σ = 256650240. Its totient is φ = 20224512.

The previous prime is 78698251. The next prime is 78698273. The reversal of 78698256 is 65289687.

It is a junction number, because it is equal to n+sod(n) for n = 78698199 and 78698208.

It is not an unprimeable number, because it can be changed into a prime (78698251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187615 + ... + 188033.

It is an arithmetic number, because the mean of its divisors is an integer number (1604064).

Almost surely, 2^78698256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78698256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128325120).

78698256 is an abundant number, since it is smaller than the sum of its proper divisors (177951984).

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

78698256 is a wasteful number, since it uses less digits than its factorization.

78698256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 487 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 78698256 is about 8871.2037514646. The cubic root of 78698256 is about 428.5370438445.

The spelling of 78698256 in words is "seventy-eight million, six hundred ninety-eight thousand, two hundred fifty-six".