79440000 has 160 divisors (see below), whose sum is σ = 264477840. Its totient is φ = 21120000.

The previous prime is 79439977. The next prime is 79440037. The reversal of 79440000 is 4497.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 239835 + ... + 240165.

Almost surely, 2^79440000 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 79440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132238920).

79440000 is an abundant number, since it is smaller than the sum of its proper divisors (185037840).

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

79440000 is an equidigital number, since it uses as much as digits as its factorization.

79440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 79440000 is about 8912.9119820629. The cubic root of 79440000 is about 429.8791800451.

Adding to 79440000 its reverse (4497), we get a palindrome (79444497).

The spelling of 79440000 in words is "seventy-nine million, four hundred forty thousand".