420937530 has 128 divisors (see below), whose sum is σ = 1154635776. Its totient is φ = 97459200.

The previous prime is 420937511. The next prime is 420937541. The reversal of 420937530 is 35739024.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420937491 and 420937500.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 446860 + ... + 447800.

It is an arithmetic number, because the mean of its divisors is an integer number (9020592).

Almost surely, 2^420937530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420937530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577317888).

420937530 is an abundant number, since it is smaller than the sum of its proper divisors (733698246).

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

420937530 is a wasteful number, since it uses less digits than its factorization.

420937530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 420937530 is about 20516.7621714539. The cubic root of 420937530 is about 749.4440502172. Note that the first 3 decimals are identical.

The spelling of 420937530 in words is "four hundred twenty million, nine hundred thirty-seven thousand, five hundred thirty".