127820638 has 32 divisors (see below), whose sum is σ = 221460480. Its totient is φ = 54720000.

The previous prime is 127820633. The next prime is 127820653. The reversal of 127820638 is 836028721.

It is a junction number, because it is equal to n+sod(n) for n = 127820597 and 127820606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127820633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79038 + ... + 80638.

It is an arithmetic number, because the mean of its divisors is an integer number (6920640).

Almost surely, 2^127820638 is an apocalyptic number.

127820638 is a deficient number, since it is larger than the sum of its proper divisors (93639842).

127820638 is a wasteful number, since it uses less digits than its factorization.

127820638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 127820638 is about 11305.7789647596. The cubic root of 127820638 is about 503.7329120463.

The spelling of 127820638 in words is "one hundred twenty-seven million, eight hundred twenty thousand, six hundred thirty-eight".