420838755 has 16 divisors (see below), whose sum is σ = 673678080. Its totient is φ = 224335328.

The previous prime is 420838753. The next prime is 420838837. The reversal of 420838755 is 557838024.

It is a cyclic number.

It is not a de Polignac number, because 420838755 - 2¹ = 420838753 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420838753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30556 + ... + 42134.

It is an arithmetic number, because the mean of its divisors is an integer number (42104880).

Almost surely, 2^420838755 is an apocalyptic number.

420838755 is a deficient number, since it is larger than the sum of its proper divisors (252839325).

420838755 is a wasteful number, since it uses less digits than its factorization.

420838755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14010.

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 420838755 is about 20514.3548521517. The cubic root of 420838755 is about 749.3854254239.

The spelling of 420838755 in words is "four hundred twenty million, eight hundred thirty-eight thousand, seven hundred fifty-five".