7427985840 has 120 divisors (see below), whose sum is σ = 27213468048. Its totient is φ = 1800721920.

The previous prime is 7427985839. The next prime is 7427985871. The reversal of 7427985840 is 485897247.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 461019 + ... + 476858.

Almost surely, 2^7427985840 is an apocalyptic number.

It is an amenable number.

7427985840 is an abundant number, since it is smaller than the sum of its proper divisors (19785482208).

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

7427985840 is a wasteful number, since it uses less digits than its factorization.

7427985840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937907 (or 937898 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The square root of 7427985840 is about 86185.7635575621. The cubic root of 7427985840 is about 1951.1486408185.

The spelling of 7427985840 in words is "seven billion, four hundred twenty-seven million, nine hundred eighty-five thousand, eight hundred forty".