7999280 has 20 divisors (see below), whose sum is σ = 18598512. Its totient is φ = 3199680.

The previous prime is 7999249. The next prime is 7999283. The reversal of 7999280 is 829997.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7999283) 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 3 ways as a sum of consecutive naturals, for example, 49916 + ... + 50075.

Almost surely, 2^7999280 is an apocalyptic number.

It is an amenable number.

7999280 is an abundant number, since it is smaller than the sum of its proper divisors (10599232).

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

7999280 is a wasteful number, since it uses less digits than its factorization.

7999280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100004 (or 99998 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 7999280 is about 2828.2998426617. The cubic root of 7999280 is about 199.9939998200.

The spelling of 7999280 in words is "seven million, nine hundred ninety-nine thousand, two hundred eighty".