420271672 has 8 divisors (see below), whose sum is σ = 788009400. Its totient is φ = 210135832.

The previous prime is 420271669. The next prime is 420271679. The reversal of 420271672 is 276172024.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420271679) 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 as a sum of consecutive naturals, namely, 26266972 + ... + 26266987.

It is an arithmetic number, because the mean of its divisors is an integer number (98501175).

Almost surely, 2^420271672 is an apocalyptic number.

It is an amenable number.

420271672 is a deficient number, since it is larger than the sum of its proper divisors (367737728).

420271672 is a wasteful number, since it uses less digits than its factorization.

420271672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52533965 (or 52533961 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 420271672 is about 20500.5285785513. The cubic root of 420271672 is about 749.0486735178.

The spelling of 420271672 in words is "four hundred twenty million, two hundred seventy-one thousand, six hundred seventy-two".