402424144 has 40 divisors (see below), whose sum is σ = 806948352. Its totient is φ = 194213760.

The previous prime is 402424133. The next prime is 402424151. The reversal of 402424144 is 441424204.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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, 248682 + ... + 250294.

Almost surely, 2^402424144 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 402424144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403474176).

402424144 is an abundant number, since it is smaller than the sum of its proper divisors (404524208).

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

402424144 is a wasteful number, since it uses less digits than its factorization.

402424144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 402424144 is about 20060.5120572731. The cubic root of 402424144 is about 738.2917401315.

Adding to 402424144 its reverse (441424204), we get a palindrome (843848348).

The spelling of 402424144 in words is "four hundred two million, four hundred twenty-four thousand, one hundred forty-four".