420189748 has 48 divisors (see below), whose sum is σ = 876814848. Its totient is φ = 173952000.

The previous prime is 420189743. The next prime is 420189761. The reversal of 420189748 is 847981024.

It is a Cunningham number, because it is equal to 749³-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420189743) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14128 + ... + 32248.

It is an arithmetic number, because the mean of its divisors is an integer number (18266976).

Almost surely, 2^420189748 is an apocalyptic number.

It is an amenable number.

420189748 is an abundant number, since it is smaller than the sum of its proper divisors (456625100).

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

420189748 is a wasteful number, since it uses less digits than its factorization.

420189748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18184 (or 18182 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 420189748 is about 20498.5303863472. The cubic root of 420189748 is about 748.9999994058. Note that the first 6 decimals are identical.

The spelling of 420189748 in words is "four hundred twenty million, one hundred eighty-nine thousand, seven hundred forty-eight".