4545640 has 32 divisors (see below), whose sum is σ = 11158560. Its totient is φ = 1652800.

The previous prime is 4545601. The next prime is 4545641. The reversal of 4545640 is 465454.

It is a junction number, because it is equal to n+sod(n) for n = 4545599 and 4545608.

It is not an unprimeable number, because it can be changed into a prime (4545641) 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, 4726 + ... + 5605.

It is an arithmetic number, because the mean of its divisors is an integer number (348705).

Almost surely, 2^4545640 is an apocalyptic number.

4545640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4545640 is an abundant number, since it is smaller than the sum of its proper divisors (6612920).

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

4545640 is a wasteful number, since it uses less digits than its factorization.

4545640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10353 (or 10349 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 4545640 is about 2132.0506560586. The cubic root of 4545640 is about 165.6526340505.

The spelling of 4545640 in words is "four million, five hundred forty-five thousand, six hundred forty".