425308128 has 96 divisors (see below), whose sum is σ = 1279514880. Its totient is φ = 121175040.

The previous prime is 425308109. The next prime is 425308139. The reversal of 425308128 is 821803524.

It is a Cunningham number, because it is equal to 20623²-1.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329308 + ... + 330596.

It is an arithmetic number, because the mean of its divisors is an integer number (13328280).

Almost surely, 2^425308128 is an apocalyptic number.

425308128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425308128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639757440).

425308128 is an abundant number, since it is smaller than the sum of its proper divisors (854206752).

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

425308128 is a wasteful number, since it uses less digits than its factorization.

425308128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 425308128 is about 20622.9999757552. Note that the first 4 decimals coincide. The cubic root of 425308128 is about 752.0289524088.

The spelling of 425308128 in words is "four hundred twenty-five million, three hundred eight thousand, one hundred twenty-eight".