420134232 has 96 divisors (see below), whose sum is σ = 1286193600. Its totient is φ = 113714496.

The previous prime is 420134189. The next prime is 420134249. The reversal of 420134232 is 232431024.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 420134199 and 420134208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12943 + ... + 31745.

It is an arithmetic number, because the mean of its divisors is an integer number (13397850).

Almost surely, 2^420134232 is an apocalyptic number.

420134232 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420134232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643096800).

420134232 is an abundant number, since it is smaller than the sum of its proper divisors (866059368).

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

420134232 is a wasteful number, since it uses less digits than its factorization.

420134232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18845 (or 18834 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 420134232 is about 20497.1761957593. The cubic root of 420134232 is about 748.9670116778.

Adding to 420134232 its reverse (232431024), we get a palindrome (652565256).

The spelling of 420134232 in words is "four hundred twenty million, one hundred thirty-four thousand, two hundred thirty-two".