4542640 has 20 divisors (see below), whose sum is σ = 10561824. Its totient is φ = 1817024.

The previous prime is 4542631. The next prime is 4542697. The reversal of 4542640 is 462454.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28312 + ... + 28471.

Almost surely, 2^4542640 is an apocalyptic number.

4542640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4542640 is an abundant number, since it is smaller than the sum of its proper divisors (6019184).

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

4542640 is a wasteful number, since it uses less digits than its factorization.

4542640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56796 (or 56790 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4542640 is about 2131.3469919279. The cubic root of 4542640 is about 165.6161839380.

The spelling of 4542640 in words is "four million, five hundred forty-two thousand, six hundred forty".