451538780 has 48 divisors (see below), whose sum is σ = 1182214656. Its totient is φ = 140738880.

The previous prime is 451538767. The next prime is 451538797. The reversal of 451538780 is 87835154.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145064 + ... + 148143.

It is an arithmetic number, because the mean of its divisors is an integer number (24629472).

Almost surely, 2^451538780 is an apocalyptic number.

It is an amenable number.

451538780 is an abundant number, since it is smaller than the sum of its proper divisors (730675876).

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

451538780 is a wasteful number, since it uses less digits than its factorization.

451538780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293234 (or 293232 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 451538780 is about 21249.4418750234. The cubic root of 451538780 is about 767.1819065425.

The spelling of 451538780 in words is "four hundred fifty-one million, five hundred thirty-eight thousand, seven hundred eighty".