403999960 has 64 divisors (see below), whose sum is σ = 1118779200. Its totient is φ = 127858176.

The previous prime is 403999949. The next prime is 403999961. The reversal of 403999960 is 69999304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403999961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51855 + ... + 59134.

It is an arithmetic number, because the mean of its divisors is an integer number (17480925).

Almost surely, 2^403999960 is an apocalyptic number.

403999960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403999960 is an abundant number, since it is smaller than the sum of its proper divisors (714779240).

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

403999960 is a wasteful number, since it uses less digits than its factorization.

403999960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111020 (or 111016 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 403999960 is about 20099.7502472046. The cubic root of 403999960 is about 739.2541547735.

It can be divided in two parts, 40 and 3999960, that added together give a square (4000000 = 2000²).

The spelling of 403999960 in words is "four hundred three million, nine hundred ninety-nine thousand, nine hundred sixty".