6990478240 has 96 divisors (see below), whose sum is σ = 16792707456. Its totient is φ = 2749393920.

The previous prime is 6990478181. The next prime is 6990478247. The reversal of 6990478240 is 428740996.

It is not an unprimeable number, because it can be changed into a prime (6990478247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6395134 + ... + 6396226.

It is an arithmetic number, because the mean of its divisors is an integer number (174924036).

Almost surely, 2^6990478240 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 6990478240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8396353728).

6990478240 is an abundant number, since it is smaller than the sum of its proper divisors (9802229216).

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

6990478240 is a wasteful number, since it uses less digits than its factorization.

6990478240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 6990478240 is about 83609.0798896866. The cubic root of 6990478240 is about 1912.0634334096.

The spelling of 6990478240 in words is "six billion, nine hundred ninety million, four hundred seventy-eight thousand, two hundred forty".