403948642488 has 128 divisors (see below), whose sum is σ = 1068881702400. Its totient is φ = 126958233600.

The previous prime is 403948642481. The next prime is 403948642519. The reversal of 403948642488 is 884246849304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403948642481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16248948 + ... + 16273788.

It is an arithmetic number, because the mean of its divisors is an integer number (8350638300).

Almost surely, 2^403948642488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403948642488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534440851200).

403948642488 is an abundant number, since it is smaller than the sum of its proper divisors (664933059912).

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

403948642488 is a wasteful number, since it uses less digits than its factorization.

403948642488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25293 (or 25289 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 60.

The spelling of 403948642488 in words is "four hundred three billion, nine hundred forty-eight million, six hundred forty-two thousand, four hundred eighty-eight".