4491564 has 48 divisors (see below), whose sum is σ = 13069056. Its totient is φ = 1166400.

The previous prime is 4491551. The next prime is 4491569. The reversal of 4491564 is 4651944.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (4491569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507 + ... + 3354.

It is an arithmetic number, because the mean of its divisors is an integer number (272272).

Almost surely, 2^4491564 is an apocalyptic number.

4491564 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4491564 is an abundant number, since it is smaller than the sum of its proper divisors (8577492).

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

4491564 is a wasteful number, since it uses less digits than its factorization.

4491564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4884 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 4491564 is about 2119.3310265270. The cubic root of 4491564 is about 164.9931310272.

The spelling of 4491564 in words is "four million, four hundred ninety-one thousand, five hundred sixty-four".