4561640 has 16 divisors (see below), whose sum is σ = 10263780. Its totient is φ = 1824640.

The previous prime is 4561639. The next prime is 4561651. The reversal of 4561640 is 461654.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4169764 + 391876 = 2042^2 + 626^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56981 + ... + 57060.

Almost surely, 2^4561640 is an apocalyptic number.

4561640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4561640 is an abundant number, since it is smaller than the sum of its proper divisors (5702140).

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

4561640 is a wasteful number, since it uses less digits than its factorization.

4561640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114052 (or 114048 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4561640 is about 2135.7996160689. The cubic root of 4561640 is about 165.8467642857.

The spelling of 4561640 in words is "four million, five hundred sixty-one thousand, six hundred forty".