402144132 has 48 divisors (see below), whose sum is σ = 1014198080. Its totient is φ = 123285888.

The previous prime is 402144107. The next prime is 402144137. The reversal of 402144132 is 231441204.

It is a junction number, because it is equal to n+sod(n) for n = 402144099 and 402144108.

It is not an unprimeable number, because it can be changed into a prime (402144137) 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, 39594 + ... + 48702.

Almost surely, 2^402144132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402144132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507099040).

402144132 is an abundant number, since it is smaller than the sum of its proper divisors (612053948).

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

402144132 is a wasteful number, since it uses less digits than its factorization.

402144132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412 (or 9410 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 402144132 is about 20053.5316590370. The cubic root of 402144132 is about 738.1204627061.

Adding to 402144132 its reverse (231441204), we get a palindrome (633585336).

The spelling of 402144132 in words is "four hundred two million, one hundred forty-four thousand, one hundred thirty-two".