420624685 has 16 divisors (see below), whose sum is σ = 545534640. Its totient is φ = 309496320.

The previous prime is 420624683. The next prime is 420624697. The reversal of 420624685 is 586426024.

It can be written as a sum of positive squares in 8 ways, for example, as 1726596 + 418898089 = 1314^2 + 20467^2 .

It is not a de Polignac number, because 420624685 - 2¹ = 420624683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420624683) 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 in 15 ways as a sum of consecutive naturals, for example, 6751 + ... + 29779.

It is an arithmetic number, because the mean of its divisors is an integer number (34095915).

Almost surely, 2^420624685 is an apocalyptic number.

It is an amenable number.

420624685 is a deficient number, since it is larger than the sum of its proper divisors (124909955).

420624685 is a wasteful number, since it uses less digits than its factorization.

420624685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23328.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 420624685 is about 20509.1366224910. The cubic root of 420624685 is about 749.2583394205.

The spelling of 420624685 in words is "four hundred twenty million, six hundred twenty-four thousand, six hundred eighty-five".