420723672 has 16 divisors (see below), whose sum is σ = 1051809240. Its totient is φ = 140241216.

The previous prime is 420723647. The next prime is 420723691. The reversal of 420723672 is 276327024.

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, 8765053 + ... + 8765100.

Almost surely, 2^420723672 is an apocalyptic number.

It is an amenable number.

420723672 is an abundant number, since it is smaller than the sum of its proper divisors (631085568).

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

420723672 is a wasteful number, since it uses less digits than its factorization.

420723672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530162 (or 17530158 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 420723672 is about 20511.5497220468. The cubic root of 420723672 is about 749.3171099592.

The spelling of 420723672 in words is "four hundred twenty million, seven hundred twenty-three thousand, six hundred seventy-two".