452987640 has 160 divisors (see below), whose sum is σ = 1740134880. Its totient is φ = 103534848.

The previous prime is 452987617. The next prime is 452987641. The reversal of 452987640 is 46789254.

It is a happy number.

452987640 is a `hidden beast` number, since 4 + 529 + 87 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452987641) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 12694 + ... + 32666.

It is an arithmetic number, because the mean of its divisors is an integer number (10875843).

Almost surely, 2^452987640 is an apocalyptic number.

452987640 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 452987640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870067440).

452987640 is an abundant number, since it is smaller than the sum of its proper divisors (1287147240).

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

452987640 is a wasteful number, since it uses less digits than its factorization.

452987640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20003 (or 19990 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 452987640 is about 21283.5062900829. The cubic root of 452987640 is about 768.0015869108.

The spelling of 452987640 in words is "four hundred fifty-two million, nine hundred eighty-seven thousand, six hundred forty".