6740409 has 16 divisors (see below), whose sum is σ = 9725184. Its totient is φ = 4128000.

The previous prime is 6740407. The next prime is 6740429. The reversal of 6740409 is 9040476.

It is not a de Polignac number, because 6740409 - 2¹ = 6740407 is a prime.

It is a super-2 number, since 2×6740409² = 90866226974562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6740407) 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, 15424 + ... + 15854.

It is an arithmetic number, because the mean of its divisors is an integer number (607824).

Almost surely, 2^6740409 is an apocalyptic number.

It is an amenable number.

6740409 is a deficient number, since it is larger than the sum of its proper divisors (2984775).

6740409 is a wasteful number, since it uses less digits than its factorization.

6740409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 6740409 is about 2596.2297664113. The cubic root of 6740409 is about 188.8986046649.

The spelling of 6740409 in words is "six million, seven hundred forty thousand, four hundred nine".