454243140 has 120 divisors (see below), whose sum is σ = 1534662360. Its totient is φ = 111808512.

The previous prime is 454243129. The next prime is 454243151. The reversal of 454243140 is 41342454.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (454243129) and next prime (454243151).

It can be written as a sum of positive squares in 4 ways, for example, as 15256836 + 438986304 = 3906^2 + 20952^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10276 + ... + 31844.

It is an arithmetic number, because the mean of its divisors is an integer number (12788853).

Almost surely, 2^454243140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 454243140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (767331180).

454243140 is an abundant number, since it is smaller than the sum of its proper divisors (1080419220).

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

454243140 is a wasteful number, since it uses less digits than its factorization.

454243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21603 (or 21592 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 454243140 is about 21312.9805517670. The cubic root of 454243140 is about 768.7104631659.

Adding to 454243140 its reverse (41342454), we get a palindrome (495585594).

The spelling of 454243140 in words is "four hundred fifty-four million, two hundred forty-three thousand, one hundred forty".