6979440 has 80 divisors (see below), whose sum is σ = 23311008. Its totient is φ = 1717248.

The previous prime is 6979439. The next prime is 6979463. The reversal of 6979440 is 449796.

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

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2002 + ... + 4238.

Almost surely, 2^6979440 is an apocalyptic number.

6979440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6979440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11655504).

6979440 is an abundant number, since it is smaller than the sum of its proper divisors (16331568).

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

6979440 is a wasteful number, since it uses less digits than its factorization.

6979440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 6979440 is about 2641.8629790358. The cubic root of 6979440 is about 191.1056495445.

The spelling of 6979440 in words is "six million, nine hundred seventy-nine thousand, four hundred forty".