403023540 has 48 divisors (see below), whose sum is σ = 1138471488. Its totient is φ = 106520064.

The previous prime is 403023521. The next prime is 403023541. The reversal of 403023540 is 45320304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403023541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22942 + ... + 36501.

It is an arithmetic number, because the mean of its divisors is an integer number (23718156).

Almost surely, 2^403023540 is an apocalyptic number.

It is an amenable number.

403023540 is an abundant number, since it is smaller than the sum of its proper divisors (735447948).

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

403023540 is a wasteful number, since it uses less digits than its factorization.

403023540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59568 (or 59566 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 403023540 is about 20075.4461967848. The cubic root of 403023540 is about 738.6581111141.

Adding to 403023540 its reverse (45320304), we get a palindrome (448343844).

The spelling of 403023540 in words is "four hundred three million, twenty-three thousand, five hundred forty".