7042640820 has 24 divisors (see below), whose sum is σ = 19719394464. Its totient is φ = 1878037536.

The previous prime is 7042640797. The next prime is 7042640821. The reversal of 7042640820 is 280462407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7042640821) by changing a digit.

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, 58688614 + ... + 58688733.

It is an arithmetic number, because the mean of its divisors is an integer number (821641436).

Almost surely, 2^7042640820 is an apocalyptic number.

It is an amenable number.

7042640820 is an abundant number, since it is smaller than the sum of its proper divisors (12676753644).

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

7042640820 is a wasteful number, since it uses less digits than its factorization.

7042640820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117377359 (or 117377357 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 7042640820 is about 83920.4433973034. The cubic root of 7042640820 is about 1916.8075582714.

The spelling of 7042640820 in words is "seven billion, forty-two million, six hundred forty thousand, eight hundred twenty".