420920934 has 64 divisors (see below), whose sum is σ = 986798592. Its totient is φ = 117216000.

The previous prime is 420920893. The next prime is 420920939. The reversal of 420920934 is 439029024.

It is a junction number, because it is equal to n+sod(n) for n = 420920895 and 420920904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420920939) 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, 283474 + ... + 284954.

It is an arithmetic number, because the mean of its divisors is an integer number (15418728).

Almost surely, 2^420920934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420920934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493399296).

420920934 is an abundant number, since it is smaller than the sum of its proper divisors (565877658).

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

420920934 is a wasteful number, since it uses less digits than its factorization.

420920934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 420920934 is about 20516.3577176847. The cubic root of 420920934 is about 749.4342008246.

Adding to 420920934 its reverse (439029024), we get a palindrome (859949958).

The spelling of 420920934 in words is "four hundred twenty million, nine hundred twenty thousand, nine hundred thirty-four".