403643420 has 24 divisors (see below), whose sum is σ = 852858384. Its totient is φ = 160465536.

The previous prime is 403643419. The next prime is 403643519. The reversal of 403643420 is 24346304.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 403643420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58649 + ... + 65168.

It is an arithmetic number, because the mean of its divisors is an integer number (35535766).

Almost surely, 2^403643420 is an apocalyptic number.

It is an amenable number.

403643420 is an abundant number, since it is smaller than the sum of its proper divisors (449214964).

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

403643420 is a wasteful number, since it uses less digits than its factorization.

403643420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123989 (or 123987 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 403643420 is about 20090.8790250701. The cubic root of 403643420 is about 739.0366207164.

Adding to 403643420 its reverse (24346304), we get a palindrome (427989724).

The spelling of 403643420 in words is "four hundred three million, six hundred forty-three thousand, four hundred twenty".