425523440 has 20 divisors (see below), whose sum is σ = 989342184. Its totient is φ = 170209344.

The previous prime is 425523431. The next prime is 425523443. The reversal of 425523440 is 44325524.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425523443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659442 + ... + 2659601.

Almost surely, 2^425523440 is an apocalyptic number.

425523440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

425523440 is an abundant number, since it is smaller than the sum of its proper divisors (563818744).

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

425523440 is a wasteful number, since it uses less digits than its factorization.

425523440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319056 (or 5319050 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 425523440 is about 20628.2195062977. The cubic root of 425523440 is about 752.1558357440.

Adding to 425523440 its reverse (44325524), we get a palindrome (469848964).

The spelling of 425523440 in words is "four hundred twenty-five million, five hundred twenty-three thousand, four hundred forty".