402400332 has 24 divisors (see below), whose sum is σ = 1043260400. Its totient is φ = 134133408.

The previous prime is 402400307. The next prime is 402400333. The reversal of 402400332 is 233004204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402400333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862857 + ... + 1863072.

Almost surely, 2^402400332 is an apocalyptic number.

It is an amenable number.

402400332 is an abundant number, since it is smaller than the sum of its proper divisors (640860068).

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

402400332 is a wasteful number, since it uses less digits than its factorization.

402400332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725942 (or 3725934 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 402400332 is about 20059.9185442015. The cubic root of 402400332 is about 738.2771779256.

Adding to 402400332 its reverse (233004204), we get a palindrome (635404536).

The spelling of 402400332 in words is "four hundred two million, four hundred thousand, three hundred thirty-two".