78698456 has 32 divisors (see below), whose sum is σ = 162086400. Its totient is φ = 35655840.

The previous prime is 78698449. The next prime is 78698461. The reversal of 78698456 is 65489687.

It is a junction number, because it is equal to n+sod(n) for n = 78698398 and 78698407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7760 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (5065200).

Almost surely, 2^78698456 is an apocalyptic number.

78698456 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78698456 is an abundant number, since it is smaller than the sum of its proper divisors (83387944).

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

78698456 is a wasteful number, since it uses less digits than its factorization.

78698456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22559 (or 22555 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 78698456 is about 8871.2150238848. The cubic root of 78698456 is about 428.5374068654.

The spelling of 78698456 in words is "seventy-eight million, six hundred ninety-eight thousand, four hundred fifty-six".