6453540 has 192 divisors, whose sum is σ = 22982400. Its totient is φ = 1492992.

The previous prime is 6453533. The next prime is 6453541. The reversal of 6453540 is 453546.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6453541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174402 + ... + 174438.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

Almost surely, 2^6453540 is an apocalyptic number.

6453540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6453540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11491200).

6453540 is an abundant number, since it is smaller than the sum of its proper divisors (16528860).

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

6453540 is a wasteful number, since it uses less digits than its factorization.

6453540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 6453540 is about 2540.3818610595. The cubic root of 6453540 is about 186.1798468583.

The spelling of 6453540 in words is "six million, four hundred fifty-three thousand, five hundred forty".