453640 has 32 divisors (see below), whose sum is σ = 1114560. Its totient is φ = 164800.

The previous prime is 453637. The next prime is 453641. The reversal of 453640 is 46354.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (453641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (34830).

2⁴⁵³⁶⁴⁰ is an apocalyptic number.

453640 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 453640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557280).

453640 is an abundant number, since it is smaller than the sum of its proper divisors (660920).

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

453640 is a wasteful number, since it uses less digits than its factorization.

453640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 453640 is about 673.5280246582. The cubic root of 453640 is about 76.8370083499.

Adding to 453640 its reverse (46354), we get a palindrome (499994).

The spelling of 453640 in words is "four hundred fifty-three thousand, six hundred forty".