127223440 has 20 divisors (see below), whose sum is σ = 295794684. Its totient is φ = 50889344.

The previous prime is 127223431. The next prime is 127223513. The reversal of 127223440 is 44322721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39538944 + 87684496 = 6288^2 + 9364^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795067 + ... + 795226.

Almost surely, 2^127223440 is an apocalyptic number.

127223440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127223440 is an abundant number, since it is smaller than the sum of its proper divisors (168571244).

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

127223440 is a wasteful number, since it uses less digits than its factorization.

127223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590306 (or 1590300 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 127223440 is about 11279.3368599399. The cubic root of 127223440 is about 502.9471807857.

The spelling of 127223440 in words is "one hundred twenty-seven million, two hundred twenty-three thousand, four hundred forty".