403532640 has 576 divisors, whose sum is σ = 1729728000. Its totient is φ = 85349376.

The previous prime is 403532627. The next prime is 403532641. The reversal of 403532640 is 46235304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403532641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9384459 + ... + 9384501.

It is an arithmetic number, because the mean of its divisors is an integer number (3003000).

Almost surely, 2^403532640 is an apocalyptic number.

403532640 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 403532640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864864000).

403532640 is an abundant number, since it is smaller than the sum of its proper divisors (1326195360).

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

403532640 is a wasteful number, since it uses less digits than its factorization.

403532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 403532640 is about 20088.1218634296. The cubic root of 403532640 is about 738.9690049581.

Adding to 403532640 its reverse (46235304), we get a palindrome (449767944).

The spelling of 403532640 in words is "four hundred three million, five hundred thirty-two thousand, six hundred forty".