6397740 has 36 divisors (see below), whose sum is σ = 19407024. Its totient is φ = 1706016.

The previous prime is 6397733. The next prime is 6397751. The reversal of 6397740 is 477936.

6397740 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 6³ + 3¹³ + 9⁷ + 7⁴ + 7⁵ + 4⁵ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 6397695 and 6397704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17592 + ... + 17951.

It is an arithmetic number, because the mean of its divisors is an integer number (539084).

Almost surely, 2^6397740 is an apocalyptic number.

6397740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6397740 is an abundant number, since it is smaller than the sum of its proper divisors (13009284).

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

6397740 is a wasteful number, since it uses less digits than its factorization.

6397740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35558 (or 35553 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 6397740 is about 2529.3754169755. The cubic root of 6397740 is about 185.6416966242.

The spelling of 6397740 in words is "six million, three hundred ninety-seven thousand, seven hundred forty".