78728598 has 96 divisors (see below), whose sum is σ = 201985056. Its totient is φ = 22768128.

The previous prime is 78728593. The next prime is 78728621. The reversal of 78728598 is 89582787.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (2257920) is a multiple of the sum of its prime divisors (768).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107040 + ... + 107772.

It is an arithmetic number, because the mean of its divisors is an integer number (2104011).

Almost surely, 2^78728598 is an apocalyptic number.

78728598 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78728598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100992528).

78728598 is an abundant number, since it is smaller than the sum of its proper divisors (123256458).

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

78728598 is a wasteful number, since it uses less digits than its factorization.

78728598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 768 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 78728598 is about 8872.9137266177. The cubic root of 78728598 is about 428.5921107162.

The spelling of 78728598 in words is "seventy-eight million, seven hundred twenty-eight thousand, five hundred ninety-eight".