7139907840 has 288 divisors, whose sum is σ = 24740706816. Its totient is φ = 1744404480.

The previous prime is 7139907811. The next prime is 7139907847. The reversal of 7139907840 is 487099317.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 7139907840.

It is not an unprimeable number, because it can be changed into a prime (7139907847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7836985 + ... + 7837895.

It is an arithmetic number, because the mean of its divisors is an integer number (85905232).

Almost surely, 2^7139907840 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 7139907840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12370353408).

7139907840 is an abundant number, since it is smaller than the sum of its proper divisors (17600798976).

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

7139907840 is a wasteful number, since it uses less digits than its factorization.

7139907840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 7139907840 is about 84497.9753603600. The cubic root of 7139907840 is about 1925.5916854344.

The spelling of 7139907840 in words is "seven billion, one hundred thirty-nine million, nine hundred seven thousand, eight hundred forty".