420134040 has 80 divisors (see below), whose sum is σ = 1412128080. Its totient is φ = 112034880.

The previous prime is 420134017. The next prime is 420134047. The reversal of 420134040 is 40431024.

It is a super-2 number, since 2×420134040² = 353025223133443200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420134047) 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 19 ways as a sum of consecutive naturals, for example, 61596 + ... + 68075.

It is an arithmetic number, because the mean of its divisors is an integer number (17651601).

Almost surely, 2^420134040 is an apocalyptic number.

420134040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420134040 is an abundant number, since it is smaller than the sum of its proper divisors (991994040).

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

420134040 is a wasteful number, since it uses less digits than its factorization.

420134040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129694 (or 129681 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420134040 is about 20497.1715121867. The cubic root of 420134040 is about 748.9668975859.

Adding to 420134040 its reverse (40431024), we get a palindrome (460565064).

The spelling of 420134040 in words is "four hundred twenty million, one hundred thirty-four thousand, forty".