6397340940 has 36 divisors (see below), whose sum is σ = 19405268064. Its totient is φ = 1705957536.

The previous prime is 6397340923. The next prime is 6397340969. The reversal of 6397340940 is 490437936.

6397340940 is a `hidden beast` number, since 639 + 7 + 3 + 4 + 0 + 9 + 4 + 0 = 666.

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

It is a super-2 number, since 2×6397340940² = 81851942205200167200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17770212 + ... + 17770571.

It is an arithmetic number, because the mean of its divisors is an integer number (539035224).

Almost surely, 2^6397340940 is an apocalyptic number.

6397340940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6397340940 is an abundant number, since it is smaller than the sum of its proper divisors (13007927124).

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

6397340940 is a wasteful number, since it uses less digits than its factorization.

6397340940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35540798 (or 35540793 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 6397340940 is about 79983.3791484206. The cubic root of 6397340940 is about 1856.3783673428.

The spelling of 6397340940 in words is "six billion, three hundred ninety-seven million, three hundred forty thousand, nine hundred forty".