4591640 has 32 divisors (see below), whose sum is σ = 10402560. Its totient is φ = 1824000.

The previous prime is 4591633. The next prime is 4591661. The reversal of 4591640 is 461954.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 7340 + ... + 7940.

It is an arithmetic number, because the mean of its divisors is an integer number (325080).

Almost surely, 2^4591640 is an apocalyptic number.

4591640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4591640 is an abundant number, since it is smaller than the sum of its proper divisors (5810920).

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

4591640 is a wasteful number, since it uses less digits than its factorization.

4591640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 4591640 is about 2142.8112376035. The cubic root of 4591640 is about 166.2095384602.

The spelling of 4591640 in words is "four million, five hundred ninety-one thousand, six hundred forty".