420038881 has 2 divisors, whose sum is σ = 420038882. Its totient is φ = 420038880.

The previous prime is 420038819. The next prime is 420038887. The reversal of 420038881 is 188830024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376360000 + 43678881 = 19400^2 + 6609^2 .

It is a cyclic number.

It is not a de Polignac number, because 420038881 - 2⁷ = 420038753 is a prime.

It is a super-2 number, since 2×420038881² = 352865323103464322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420038887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210019440 + 210019441.

It is an arithmetic number, because the mean of its divisors is an integer number (210019441).

Almost surely, 2^420038881 is an apocalyptic number.

It is an amenable number.

420038881 is a deficient number, since it is larger than the sum of its proper divisors (1).

420038881 is an equidigital number, since it uses as much as digits as its factorization.

420038881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 420038881 is about 20494.8501092348. The cubic root of 420038881 is about 748.9103471237.

The spelling of 420038881 in words is "four hundred twenty million, thirty-eight thousand, eight hundred eighty-one".