425866820 has 12 divisors (see below), whose sum is σ = 894320364. Its totient is φ = 170346720.

The previous prime is 425866811. The next prime is 425866843. The reversal of 425866820 is 28668524.

It can be written as a sum of positive squares in 2 ways, for example, as 235868164 + 189998656 = 15358^2 + 13784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10646651 + ... + 10646690.

It is an arithmetic number, because the mean of its divisors is an integer number (74526697).

Almost surely, 2^425866820 is an apocalyptic number.

It is an amenable number.

425866820 is an abundant number, since it is smaller than the sum of its proper divisors (468453544).

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

425866820 is a wasteful number, since it uses less digits than its factorization.

425866820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21293350 (or 21293348 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 425866820 is about 20636.5408923104. The cubic root of 425866820 is about 752.3581010054.

The spelling of 425866820 in words is "four hundred twenty-five million, eight hundred sixty-six thousand, eight hundred twenty".