6494640 has 40 divisors (see below), whose sum is σ = 20134128. Its totient is φ = 1731840.

The previous prime is 6494633. The next prime is 6494641. The reversal of 6494640 is 464946.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6494641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13291 + ... + 13770.

Almost surely, 2^6494640 is an apocalyptic number.

6494640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6494640 is an abundant number, since it is smaller than the sum of its proper divisors (13639488).

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

6494640 is a wasteful number, since it uses less digits than its factorization.

6494640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27077 (or 27071 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6494640 is about 2548.4583575173. The cubic root of 6494640 is about 186.5742456319.

The spelling of 6494640 in words is "six million, four hundred ninety-four thousand, six hundred forty".