420128373 has 32 divisors (see below), whose sum is σ = 669597696. Its totient is φ = 229097088.

The previous prime is 420128369. The next prime is 420128381. The reversal of 420128373 is 373821024.

It is not a de Polignac number, because 420128373 - 2² = 420128369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420128373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420128333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292465 + ... + 293897.

It is an arithmetic number, because the mean of its divisors is an integer number (20924928).

Almost surely, 2^420128373 is an apocalyptic number.

It is an amenable number.

420128373 is a deficient number, since it is larger than the sum of its proper divisors (249469323).

420128373 is a wasteful number, since it uses less digits than its factorization.

420128373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 420128373 is about 20497.0332731349. The cubic root of 420128373 is about 748.9635300777.

Adding to 420128373 its reverse (373821024), we get a palindrome (793949397).

The spelling of 420128373 in words is "four hundred twenty million, one hundred twenty-eight thousand, three hundred seventy-three".