6997428240 has 80 divisors (see below), whose sum is σ = 23664038976. Its totient is φ = 1696345600.

The previous prime is 6997428223. The next prime is 6997428247. The reversal of 6997428240 is 428247996.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (6997428247) 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, 1322631 + ... + 1327910.

Almost surely, 2^6997428240 is an apocalyptic number.

6997428240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6997428240 is an abundant number, since it is smaller than the sum of its proper divisors (16666610736).

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

6997428240 is a wasteful number, since it uses less digits than its factorization.

6997428240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650568 (or 2650562 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 6997428240 is about 83650.6320358669. The cubic root of 6997428240 is about 1912.6968874153.

The spelling of 6997428240 in words is "six billion, nine hundred ninety-seven million, four hundred twenty-eight thousand, two hundred forty".