453221640 has 96 divisors (see below), whose sum is σ = 1475674200. Its totient is φ = 120637440.

The previous prime is 453221627. The next prime is 453221653. The reversal of 453221640 is 46122354.

It is an interprime number because it is at equal distance from previous prime (453221627) and next prime (453221653).

It can be written as a sum of positive squares in 4 ways, for example, as 174398436 + 278823204 = 13206^2 + 16698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316446 + ... + 317874.

Almost surely, 2^453221640 is an apocalyptic number.

453221640 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 453221640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737837100).

453221640 is an abundant number, since it is smaller than the sum of its proper divisors (1022452560).

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

453221640 is a wasteful number, since it uses less digits than its factorization.

453221640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 453221640 is about 21289.0027948704. The cubic root of 453221640 is about 768.1338064385.

Adding to 453221640 its reverse (46122354), we get a palindrome (499343994).

The spelling of 453221640 in words is "four hundred fifty-three million, two hundred twenty-one thousand, six hundred forty".