641287962 has 128 divisors (see below), whose sum is σ = 1774080000. Its totient is φ = 167541696.

The previous prime is 641287961. The next prime is 641288003. The reversal of 641287962 is 269782146.

641287962 = T₂₈ + T₂₉ + ... + T₁₅₆₆.

It is a happy number.

It is a super-2 number, since 2×641287962² = 822500500412226888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641287961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206739 + ... + 209817.

It is an arithmetic number, because the mean of its divisors is an integer number (13860000).

Almost surely, 2^641287962 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641287962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887040000).

641287962 is an abundant number, since it is smaller than the sum of its proper divisors (1132792038).

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

641287962 is a wasteful number, since it uses less digits than its factorization.

641287962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145 (or 3139 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 641287962 is about 25323.6640713780. The cubic root of 641287962 is about 862.3515782413.

The spelling of 641287962 in words is "six hundred forty-one million, two hundred eighty-seven thousand, nine hundred sixty-two".