402234144 has 96 divisors (see below), whose sum is σ = 1204035840. Its totient is φ = 116477952.

The previous prime is 402234137. The next prime is 402234167. The reversal of 402234144 is 441432204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11737 + ... + 30695.

It is an arithmetic number, because the mean of its divisors is an integer number (12542040).

Almost surely, 2^402234144 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 402234144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602017920).

402234144 is an abundant number, since it is smaller than the sum of its proper divisors (801801696).

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

402234144 is a wasteful number, since it uses less digits than its factorization.

402234144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19002 (or 18994 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 402234144 is about 20055.7758264297. The cubic root of 402234144 is about 738.1755298138.

Adding to 402234144 its reverse (441432204), we get a palindrome (843666348).

The spelling of 402234144 in words is "four hundred two million, two hundred thirty-four thousand, one hundred forty-four".