79489800 has 288 divisors, whose sum is σ = 297897600. Its totient is φ = 18869760.

The previous prime is 79489789. The next prime is 79489811. The reversal of 79489800 is 898497.

It is an interprime number because it is at equal distance from previous prime (79489789) and next prime (79489811).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1006161 + ... + 1006239.

Almost surely, 2^79489800 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 79489800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148948800).

79489800 is an abundant number, since it is smaller than the sum of its proper divisors (218407800).

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

79489800 is a wasteful number, since it uses less digits than its factorization.

79489800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 79489800 is about 8915.7052441184. The cubic root of 79489800 is about 429.9689900118.

The spelling of 79489800 in words is "seventy-nine million, four hundred eighty-nine thousand, eight hundred".