7279217440 has 96 divisors (see below), whose sum is σ = 18971729280. Its totient is φ = 2617190400.

The previous prime is 7279217423. The next prime is 7279217443. The reversal of 7279217440 is 447129727.

It is not an unprimeable number, because it can be changed into a prime (7279217443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133405 + ... + 179875.

It is an arithmetic number, because the mean of its divisors is an integer number (197622180).

Almost surely, 2^7279217440 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 7279217440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9485864640).

7279217440 is an abundant number, since it is smaller than the sum of its proper divisors (11692511840).

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

7279217440 is a wasteful number, since it uses less digits than its factorization.

7279217440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46586 (or 46578 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 7279217440 is about 85318.3300352275. The cubic root of 7279217440 is about 1938.0347690134.

The spelling of 7279217440 in words is "seven billion, two hundred seventy-nine million, two hundred seventeen thousand, four hundred forty".