7493189840 has 20 divisors (see below), whose sum is σ = 17421666564. Its totient is φ = 2997275904.

The previous prime is 7493189833. The next prime is 7493189863. The reversal of 7493189840 is 489813947.

It can be written as a sum of positive squares in 2 ways, for example, as 3863368336 + 3629821504 = 62156^2 + 60248^2 .

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

It is a super-2 number, since 2×7493189840² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46832357 + ... + 46832516.

Almost surely, 2^7493189840 is an apocalyptic number.

It is an amenable number.

7493189840 is an abundant number, since it is smaller than the sum of its proper divisors (9928476724).

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

7493189840 is a wasteful number, since it uses less digits than its factorization.

7493189840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93664886 (or 93664880 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 7493189840 is about 86563.2129717930. The cubic root of 7493189840 is about 1956.8411772814.

The spelling of 7493189840 in words is "seven billion, four hundred ninety-three million, one hundred eighty-nine thousand, eight hundred forty".