7021386240 has 320 divisors, whose sum is σ = 25932804480. Its totient is φ = 1601699840.

The previous prime is 7021386227. The next prime is 7021386241. The reversal of 7021386240 is 426831207.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×7021386240² = 98599729462522675200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (7021386241) 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 31 ways as a sum of consecutive naturals, for example, 1433716 + ... + 1438604.

It is an arithmetic number, because the mean of its divisors is an integer number (81040014).

Almost surely, 2^7021386240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7021386240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12966402240).

7021386240 is an abundant number, since it is smaller than the sum of its proper divisors (18911418240).

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

7021386240 is a wasteful number, since it uses less digits than its factorization.

7021386240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943 (or 4927 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 7021386240 is about 83793.7124132831. The cubic root of 7021386240 is about 1914.8773167298.

The spelling of 7021386240 in words is "seven billion, twenty-one million, three hundred eighty-six thousand, two hundred forty".