402111424 has 112 divisors (see below), whose sum is σ = 956279520. Its totient is φ = 165335040.

The previous prime is 402111407. The next prime is 402111427. The reversal of 402111424 is 424111204.

It is a super-2 number, since 2×402111424² = 323387194622615552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402111427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484642 + ... + 485470.

It is an arithmetic number, because the mean of its divisors is an integer number (8538210).

Almost surely, 2^402111424 is an apocalyptic number.

402111424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402111424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478139760).

402111424 is an abundant number, since it is smaller than the sum of its proper divisors (554168096).

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

402111424 is a wasteful number, since it uses less digits than its factorization.

402111424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 402111424 is about 20052.7161252535. The cubic root of 402111424 is about 738.1004507280.

Adding to 402111424 its reverse (424111204), we get a palindrome (826222628).

The spelling of 402111424 in words is "four hundred two million, one hundred eleven thousand, four hundred twenty-four".