455515440 has 80 divisors (see below), whose sum is σ = 1425884928. Its totient is φ = 120284928.

The previous prime is 455515429. The next prime is 455515447. The reversal of 455515440 is 44515554.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (455515447) 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, 15507 + ... + 33933.

Almost surely, 2^455515440 is an apocalyptic number.

455515440 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 455515440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712942464).

455515440 is an abundant number, since it is smaller than the sum of its proper divisors (970369488).

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

455515440 is a wasteful number, since it uses less digits than its factorization.

455515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18546 (or 18540 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 455515440 is about 21342.8076878371. The cubic root of 455515440 is about 769.4274937055.

The spelling of 455515440 in words is "four hundred fifty-five million, five hundred fifteen thousand, four hundred forty".