455639780 has 48 divisors (see below), whose sum is σ = 1016064000. Its totient is φ = 171038208.

The previous prime is 455639773. The next prime is 455639809. The reversal of 455639780 is 87936554.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128471 + ... + 131969.

It is an arithmetic number, because the mean of its divisors is an integer number (21168000).

Almost surely, 2^455639780 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 455639780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508032000).

455639780 is an abundant number, since it is smaller than the sum of its proper divisors (560424220).

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

455639780 is a wasteful number, since it uses less digits than its factorization.

455639780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 455639780 is about 21345.7204141720. The cubic root of 455639780 is about 769.4974963901.

The spelling of 455639780 in words is "four hundred fifty-five million, six hundred thirty-nine thousand, seven hundred eighty".