127644816 has 80 divisors (see below), whose sum is σ = 356754944. Its totient is φ = 39094272.

The previous prime is 127644799. The next prime is 127644821. The reversal of 127644816 is 618446721.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 209985 + ... + 210591.

Almost surely, 2^127644816 is an apocalyptic number.

127644816 is a gapful number since it is divisible by the number (16) 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 127644816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178377472).

127644816 is an abundant number, since it is smaller than the sum of its proper divisors (229110128).

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

127644816 is a wasteful number, since it uses less digits than its factorization.

127644816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 962 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 127644816 is about 11298.0005310674. Note that the first 3 decimals coincide. The cubic root of 127644816 is about 503.5018383331.

The spelling of 127644816 in words is "one hundred twenty-seven million, six hundred forty-four thousand, eight hundred sixteen".