420530940 has 84 divisors (see below), whose sum is σ = 1324112664. Its totient is φ = 112137696.

The previous prime is 420530897. The next prime is 420530993. The reversal of 420530940 is 49035024.

420530940 is a `hidden beast` number, since 42 + 0 + 530 + 94 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 159 + ... + 29001.

It is an arithmetic number, because the mean of its divisors is an integer number (15763246).

Almost surely, 2^420530940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420530940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662056332).

420530940 is an abundant number, since it is smaller than the sum of its proper divisors (903581724).

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

420530940 is a wasteful number, since it uses less digits than its factorization.

420530940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28870 (or 28853 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 420530940 is about 20506.8510503197. The cubic root of 420530940 is about 749.2026726592.

Adding to 420530940 its reverse (49035024), we get a palindrome (469565964).

The spelling of 420530940 in words is "four hundred twenty million, five hundred thirty thousand, nine hundred forty".