1455540880 has 20 divisors (see below), whose sum is σ = 3384132732. Its totient is φ = 582216320.

The previous prime is 1455540859. The next prime is 1455540881. The reversal of 1455540880 is 880455541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 685811344 + 769729536 = 26188^2 + 27744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1455540881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9097051 + ... + 9097210.

Almost surely, 2^1455540880 is an apocalyptic number.

1455540880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1455540880 is an abundant number, since it is smaller than the sum of its proper divisors (1928591852).

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

1455540880 is a wasteful number, since it uses less digits than its factorization.

1455540880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18194274 (or 18194268 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 40.

The square root of 1455540880 is about 38151.5514756609. The cubic root of 1455540880 is about 1133.2910764714.

The spelling of 1455540880 in words is "one billion, four hundred fifty-five million, five hundred forty thousand, eight hundred eighty".