79225440 has 384 divisors, whose sum is σ = 322237440. Its totient is φ = 15925248.

The previous prime is 79225439. The next prime is 79225441. The reversal of 79225440 is 4452297.

It is an interprime number because it is at equal distance from previous prime (79225439) and next prime (79225441).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 730 × 714 × 152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79225441) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1085244 + ... + 1085316.

It is an arithmetic number, because the mean of its divisors is an integer number (839160).

Almost surely, 2^79225440 is an apocalyptic number.

79225440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79225440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161118720).

79225440 is an abundant number, since it is smaller than the sum of its proper divisors (243012000).

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

79225440 is a wasteful number, since it uses less digits than its factorization.

79225440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 79225440 is about 8900.8673734642. The cubic root of 79225440 is about 429.4918099505.

The spelling of 79225440 in words is "seventy-nine million, two hundred twenty-five thousand, four hundred forty".