425633670 has 256 divisors, whose sum is σ = 1443225600. Its totient is φ = 86693760.

The previous prime is 425633629. The next prime is 425633671. The reversal of 425633670 is 76336524.

425633670 is a `hidden beast` number, since 4 + 256 + 336 + 70 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425633671) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1226437 + ... + 1226783.

It is an arithmetic number, because the mean of its divisors is an integer number (5637600).

Almost surely, 2^425633670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425633670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721612800).

425633670 is an abundant number, since it is smaller than the sum of its proper divisors (1017591930).

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

425633670 is a wasteful number, since it uses less digits than its factorization.

425633670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 425633670 is about 20630.8911586485. The cubic root of 425633670 is about 752.2207777048.

The spelling of 425633670 in words is "four hundred twenty-five million, six hundred thirty-three thousand, six hundred seventy".