79485440 has 80 divisors (see below), whose sum is σ = 194083560. Its totient is φ = 31211520.

The previous prime is 79485437. The next prime is 79485463. The reversal of 79485440 is 4458497.

It can be written as a sum of positive squares in 4 ways, for example, as 54405376 + 25080064 = 7376^2 + 5008^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 155906 + ... + 156414.

Almost surely, 2^79485440 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 79485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97041780).

79485440 is an abundant number, since it is smaller than the sum of its proper divisors (114598120).

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

79485440 is an equidigital number, since it uses as much as digits as its factorization.

79485440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 79485440 is about 8915.4607284200. The cubic root of 79485440 is about 429.9611286297.

The spelling of 79485440 in words is "seventy-nine million, four hundred eighty-five thousand, four hundred forty".