420166720 has 56 divisors (see below), whose sum is σ = 1002328704. Its totient is φ = 167763456.

The previous prime is 420166693. The next prime is 420166727. The reversal of 420166720 is 27661024.

It is not an unprimeable number, because it can be changed into a prime (420166727) 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 in 7 ways as a sum of consecutive naturals, for example, 281817 + ... + 283303.

Almost surely, 2^420166720 is an apocalyptic number.

420166720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420166720 is an abundant number, since it is smaller than the sum of its proper divisors (582161984).

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

420166720 is a wasteful number, since it uses less digits than its factorization.

420166720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 420166720 is about 20497.9686798473. The cubic root of 420166720 is about 748.9863164708.

The spelling of 420166720 in words is "four hundred twenty million, one hundred sixty-six thousand, seven hundred twenty".