425816406 has 64 divisors (see below), whose sum is σ = 980683200. Its totient is φ = 136857600.

The previous prime is 425816389. The next prime is 425816407. The reversal of 425816406 is 604618524.

425816406 is a `hidden beast` number, since 4 + 2 + 5 + 8 + 1 + 640 + 6 = 666.

It is a super-2 number, since 2×425816406² = 362639223237513672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425816407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195966 + ... + 198126.

It is an arithmetic number, because the mean of its divisors is an integer number (15323175).

Almost surely, 2^425816406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425816406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490341600).

425816406 is an abundant number, since it is smaller than the sum of its proper divisors (554866794).

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

425816406 is a wasteful number, since it uses less digits than its factorization.

425816406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 425816406 is about 20635.3193820692. The cubic root of 425816406 is about 752.3284118504.

The spelling of 425816406 in words is "four hundred twenty-five million, eight hundred sixteen thousand, four hundred six".