425234640 has 80 divisors (see below), whose sum is σ = 1321843968. Its totient is φ = 113084928.

The previous prime is 425234639. The next prime is 425234671. The reversal of 425234640 is 46432524.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 425234598 and 425234607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93049 + ... + 97511.

Almost surely, 2^425234640 is an apocalyptic number.

425234640 is a gapful number since it is divisible by the number (40) 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 425234640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660921984).

425234640 is an abundant number, since it is smaller than the sum of its proper divisors (896609328).

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

425234640 is a wasteful number, since it uses less digits than its factorization.

425234640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4876 (or 4870 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 425234640 is about 20621.2181987389. The cubic root of 425234640 is about 751.9856361373.

The spelling of 425234640 in words is "four hundred twenty-five million, two hundred thirty-four thousand, six hundred forty".