406425630 has 128 divisors (see below), whose sum is σ = 1132185600. Its totient is φ = 92473344.

The previous prime is 406425619. The next prime is 406425659. The reversal of 406425630 is 36524604.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 390651 + ... + 391689.

It is an arithmetic number, because the mean of its divisors is an integer number (8845200).

Almost surely, 2^406425630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406425630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566092800).

406425630 is an abundant number, since it is smaller than the sum of its proper divisors (725759970).

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

406425630 is a wasteful number, since it uses less digits than its factorization.

406425630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 406425630 is about 20160.0007440476. Note that the first 3 decimals coincide. The cubic root of 406425630 is about 740.7307305836.

Subtracting from 406425630 its sum of digits (30), we obtain a square (406425600 = 20160²).

The spelling of 406425630 in words is "four hundred six million, four hundred twenty-five thousand, six hundred thirty".