420091888 has 20 divisors (see below), whose sum is σ = 814421088. Its totient is φ = 209918720.

The previous prime is 420091873. The next prime is 420091907. The reversal of 420091888 is 888190024.

It is a self number, because there is not a number n which added to its sum of digits gives 420091888.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22920 + ... + 36952.

Almost surely, 2^420091888 is an apocalyptic number.

It is an amenable number.

420091888 is a deficient number, since it is larger than the sum of its proper divisors (394329200).

420091888 is a wasteful number, since it uses less digits than its factorization.

420091888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15912 (or 15906 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 420091888 is about 20496.1432469623. The cubic root of 420091888 is about 748.9418488273.

The spelling of 420091888 in words is "four hundred twenty million, ninety-one thousand, eight hundred eighty-eight".