451720272 has 80 divisors (see below), whose sum is σ = 1221350400. Its totient is φ = 143709696.

The previous prime is 451720271. The next prime is 451720303. The reversal of 451720272 is 272027154.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451720271) 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, 91729 + ... + 96527.

It is an arithmetic number, because the mean of its divisors is an integer number (15266880).

Almost surely, 2^451720272 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 451720272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610675200).

451720272 is an abundant number, since it is smaller than the sum of its proper divisors (769630128).

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

451720272 is a wasteful number, since it uses less digits than its factorization.

451720272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900 (or 4894 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 451720272 is about 21253.7119581498. The cubic root of 451720272 is about 767.2846800907.

The spelling of 451720272 in words is "four hundred fifty-one million, seven hundred twenty thousand, two hundred seventy-two".