402003312 has 20 divisors (see below), whose sum is σ = 1038508680. Its totient is φ = 134001088.

The previous prime is 402003293. The next prime is 402003337. The reversal of 402003312 is 213300204.

It is a junction number, because it is equal to n+sod(n) for n = 402003291 and 402003300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4187487 + ... + 4187582.

It is an arithmetic number, because the mean of its divisors is an integer number (51925434).

Almost surely, 2^402003312 is an apocalyptic number.

It is an amenable number.

402003312 is an abundant number, since it is smaller than the sum of its proper divisors (636505368).

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

402003312 is a wasteful number, since it uses less digits than its factorization.

402003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8375080 (or 8375074 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 402003312 is about 20050.0202493663. The cubic root of 402003312 is about 738.0342960391.

Adding to 402003312 its reverse (213300204), we get a palindrome (615303516).

The spelling of 402003312 in words is "four hundred two million, three thousand, three hundred twelve".