641402424 has 96 divisors (see below), whose sum is σ = 1889203680. Its totient is φ = 195409152.

The previous prime is 641402387. The next prime is 641402429. The reversal of 641402424 is 424204146.

It is a happy number.

641402424 is a `hidden beast` number, since 6 + 414 + 0 + 242 + 4 = 666.

It is a super-2 number, since 2×641402424² = 822794139026151552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641402429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93082 + ... + 99734.

It is an arithmetic number, because the mean of its divisors is an integer number (19679205).

Almost surely, 2^641402424 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 641402424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944601840).

641402424 is an abundant number, since it is smaller than the sum of its proper divisors (1247801256).

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

641402424 is a wasteful number, since it uses less digits than its factorization.

641402424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781 (or 6774 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 641402424 is about 25325.9239515560. The cubic root of 641402424 is about 862.4028815663.

It can be divided in two parts, 64140 and 2424, that added together give a square (66564 = 258²).

The spelling of 641402424 in words is "six hundred forty-one million, four hundred two thousand, four hundred twenty-four".