420743408 has 20 divisors (see below), whose sum is σ = 841487808. Its totient is φ = 203585280.

The previous prime is 420743371. The next prime is 420743437. The reversal of 420743408 is 804347024.

420743408 is an admirable number.

It is a super-3 number, since 3×420743408³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423641 + ... + 424632.

Almost surely, 2^420743408 is an apocalyptic number.

It is an amenable number.

420743408 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420743408 is a wasteful number, since it uses less digits than its factorization.

420743408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848312 (or 848306 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 420743408 is about 20512.0308112093. The cubic root of 420743408 is about 749.3288265103.

The spelling of 420743408 in words is "four hundred twenty million, seven hundred forty-three thousand, four hundred eight".