402332144 has 20 divisors (see below), whose sum is σ = 820546440. Its totient is φ = 190578240.

The previous prime is 402332143. The next prime is 402332153. The reversal of 402332144 is 441233204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402332143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661427 + ... + 662034.

It is an arithmetic number, because the mean of its divisors is an integer number (41027322).

Almost surely, 2^402332144 is an apocalyptic number.

It is an amenable number.

402332144 is an abundant number, since it is smaller than the sum of its proper divisors (418214296).

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

402332144 is a wasteful number, since it uses less digits than its factorization.

402332144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323488 (or 1323482 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 402332144 is about 20058.2188640966. The cubic root of 402332144 is about 738.2354744412.

Adding to 402332144 its reverse (441233204), we get a palindrome (843565348).

The spelling of 402332144 in words is "four hundred two million, three hundred thirty-two thousand, one hundred forty-four".