78900456 has 64 divisors (see below), whose sum is σ = 205125120. Its totient is φ = 25263360.

The previous prime is 78900449. The next prime is 78900457. The reversal of 78900456 is 65400987.

It is not an unprimeable number, because it can be changed into a prime (78900457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128406 + ... + 129018.

It is an arithmetic number, because the mean of its divisors is an integer number (3205080).

Almost surely, 2^78900456 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 78900456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102562560).

78900456 is an abundant number, since it is smaller than the sum of its proper divisors (126224664).

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

78900456 is a wasteful number, since it uses less digits than its factorization.

78900456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 78900456 is about 8882.5928646989. The cubic root of 78900456 is about 428.9037444132.

The spelling of 78900456 in words is "seventy-eight million, nine hundred thousand, four hundred fifty-six".