6540730 has 64 divisors (see below), whose sum is σ = 14370048. Its totient is φ = 2096640.

The previous prime is 6540719. The next prime is 6540739. The reversal of 6540730 is 370456.

6540730 = T₃₉ + T₄₀ + ... + T₃₃₉.

It is a super-2 number, since 2×6540730² = 85562297865800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6540695 and 6540704.

It is not an unprimeable number, because it can be changed into a prime (6540739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123384 + ... + 123436.

It is an arithmetic number, because the mean of its divisors is an integer number (224532).

Almost surely, 2^6540730 is an apocalyptic number.

6540730 is an abundant number, since it is smaller than the sum of its proper divisors (7829318).

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

6540730 is a wasteful number, since it uses less digits than its factorization.

6540730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 6540730 is about 2557.4850928207. The cubic root of 6540730 is about 187.0145546165.

The spelling of 6540730 in words is "six million, five hundred forty thousand, seven hundred thirty".