641267472 has 80 divisors (see below), whose sum is σ = 1758101760. Its totient is φ = 200718336.

The previous prime is 641267467. The next prime is 641267491. The reversal of 641267472 is 274762146.

It is a super-2 number, since 2×641267472² = 822447941290541568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641267472.

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, 586158 + ... + 587250.

It is an arithmetic number, because the mean of its divisors is an integer number (21976272).

Almost surely, 2^641267472 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 641267472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879050880).

641267472 is an abundant number, since it is smaller than the sum of its proper divisors (1116834288).

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

641267472 is a wasteful number, since it uses less digits than its factorization.

641267472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1834 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 641267472 is about 25323.2595058377. The cubic root of 641267472 is about 862.3423937183.

The spelling of 641267472 in words is "six hundred forty-one million, two hundred sixty-seven thousand, four hundred seventy-two".