420189750 has 96 divisors (see below), whose sum is σ = 1196114400. Its totient is φ = 106142400.

The previous prime is 420189743. The next prime is 420189761. The reversal of 420189750 is 57981024.

420189750 is a `hidden beast` number, since 420 + 189 + 7 + 50 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37836 + ... + 47664.

It is an arithmetic number, because the mean of its divisors is an integer number (12459525).

Almost surely, 2^420189750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420189750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598057200).

420189750 is an abundant number, since it is smaller than the sum of its proper divisors (775924650).

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

420189750 is a wasteful number, since it uses less digits than its factorization.

420189750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871 (or 9858 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 420189750 is about 20498.5304351312. The cubic root of 420189750 is about 749.0000005942. Note that the first 6 decimals are identical.

The spelling of 420189750 in words is "four hundred twenty million, one hundred eighty-nine thousand, seven hundred fifty".