7279994240 has 64 divisors (see below), whose sum is σ = 17416589760. Its totient is φ = 2909847552.

The previous prime is 7279994221. The next prime is 7279994257. The reversal of 7279994240 is 424999727.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×7279994240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082729 + ... + 1089431.

It is an arithmetic number, because the mean of its divisors is an integer number (272134215).

Almost surely, 2^7279994240 is an apocalyptic number.

It is an amenable number.

7279994240 is an abundant number, since it is smaller than the sum of its proper divisors (10136595520).

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

7279994240 is a wasteful number, since it uses less digits than its factorization.

7279994240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419 (or 8407 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 7279994240 is about 85322.8822766789. The cubic root of 7279994240 is about 1938.1037055382.

The spelling of 7279994240 in words is "seven billion, two hundred seventy-nine million, nine hundred ninety-four thousand, two hundred forty".