127223640 has 96 divisors (see below), whose sum is σ = 417690000. Its totient is φ = 33580800.

The previous prime is 127223611. The next prime is 127223653. The reversal of 127223640 is 46322721.

127223640 is a `hidden beast` number, since 12 + 7 + 2 + 2 + 3 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34611 + ... + 38109.

Almost surely, 2^127223640 is an apocalyptic number.

127223640 is a gapful number since it is divisible by the number (10) 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 127223640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208845000).

127223640 is an abundant number, since it is smaller than the sum of its proper divisors (290466360).

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

127223640 is a wasteful number, since it uses less digits than its factorization.

127223640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617 (or 3610 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 127223640 is about 11279.3457257059. The cubic root of 127223640 is about 502.9474443362.

The spelling of 127223640 in words is "one hundred twenty-seven million, two hundred twenty-three thousand, six hundred forty".