402442132 has 24 divisors (see below), whose sum is σ = 746952192. Its totient is φ = 189314400.

The previous prime is 402442067. The next prime is 402442141. The reversal of 402442132 is 231244204.

It is a happy number.

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, 30244 + ... + 41467.

It is an arithmetic number, because the mean of its divisors is an integer number (31123008).

Almost surely, 2^402442132 is an apocalyptic number.

It is an amenable number.

402442132 is a deficient number, since it is larger than the sum of its proper divisors (344510060).

402442132 is a wasteful number, since it uses less digits than its factorization.

402442132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71799 (or 71797 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 402442132 is about 20060.9603957537. The cubic root of 402442132 is about 738.3027402948.

Adding to 402442132 its reverse (231244204), we get a palindrome (633686336).

The spelling of 402442132 in words is "four hundred two million, four hundred forty-two thousand, one hundred thirty-two".