641424740 has 48 divisors (see below), whose sum is σ = 1484046144. Its totient is φ = 230928000.

The previous prime is 641424731. The next prime is 641424757. The reversal of 641424740 is 47424146.

It is a super-2 number, since 2×641424740² = 822851394168135200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641424697 and 641424706.

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, 7787 + ... + 36653.

It is an arithmetic number, because the mean of its divisors is an integer number (30917628).

Almost surely, 2^641424740 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 641424740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742023072).

641424740 is an abundant number, since it is smaller than the sum of its proper divisors (842621404).

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

641424740 is a wasteful number, since it uses less digits than its factorization.

641424740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28988 (or 28986 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 641424740 is about 25326.3645239501. The cubic root of 641424740 is about 862.4128831705.

Adding to 641424740 its reverse (47424146), we get a palindrome (688848886).

The spelling of 641424740 in words is "six hundred forty-one million, four hundred twenty-four thousand, seven hundred forty".