402281424 has 80 divisors (see below), whose sum is σ = 1167782400. Its totient is φ = 132574464.

The previous prime is 402281419. The next prime is 402281443. The reversal of 402281424 is 424182204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33217 + ... + 43679.

It is an arithmetic number, because the mean of its divisors is an integer number (14597280).

Almost surely, 2^402281424 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 402281424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583891200).

402281424 is an abundant number, since it is smaller than the sum of its proper divisors (765500976).

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

402281424 is a wasteful number, since it uses less digits than its factorization.

402281424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10569 (or 10557 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 402281424 is about 20056.9545046101. The cubic root of 402281424 is about 738.2044512535.

The spelling of 402281424 in words is "four hundred two million, two hundred eighty-one thousand, four hundred twenty-four".