6539472 has 30 divisors (see below), whose sum is σ = 18301842. Its totient is φ = 2179776.

The previous prime is 6539443. The next prime is 6539473. The reversal of 6539472 is 2749356.

It can be written as a sum of positive squares in only one way, i.e., 3594816 + 2944656 = 1896^2 + 1716^2 .

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 6⁸ + 5 + 3¹⁴ + 9⁵ + 4⁵ + 7⁵ + 2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22563 + ... + 22850.

Almost surely, 2^6539472 is an apocalyptic number.

It is an amenable number.

6539472 is an abundant number, since it is smaller than the sum of its proper divisors (11762370).

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

6539472 is a wasteful number, since it uses less digits than its factorization.

6539472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45427 (or 45418 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 6539472 is about 2557.2391362561. The cubic root of 6539472 is about 187.0025641407.

The spelling of 6539472 in words is "six million, five hundred thirty-nine thousand, four hundred seventy-two".