4540840 has 32 divisors (see below), whose sum is σ = 10389960. Its totient is φ = 1785600.

The previous prime is 4540807. The next prime is 4540883. The reversal of 4540840 is 480454.

It can be written as a sum of positive squares in 4 ways, for example, as 784996 + 3755844 = 886^2 + 1938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510 + ... + 3370.

Almost surely, 2^4540840 is an apocalyptic number.

4540840 is a gapful number since it is divisible by the number (40) 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 4540840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5194980).

4540840 is an abundant number, since it is smaller than the sum of its proper divisors (5849120).

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

4540840 is a wasteful number, since it uses less digits than its factorization.

4540840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 4540840 is about 2130.9246819163. The cubic root of 4540840 is about 165.5943061669.

The spelling of 4540840 in words is "four million, five hundred forty thousand, eight hundred forty".