641280450 has 48 divisors (see below), whose sum is σ = 1614137760. Its totient is φ = 168453120.

The previous prime is 641280439. The next prime is 641280461. The reversal of 641280450 is 54082146.

It is an interprime number because it is at equal distance from previous prime (641280439) and next prime (641280461).

It is a super-2 number, since 2×641280450² = 822481231104405000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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, 21855 + ... + 41954.

It is an arithmetic number, because the mean of its divisors is an integer number (33627870).

Almost surely, 2^641280450 is an apocalyptic number.

641280450 is an abundant number, since it is smaller than the sum of its proper divisors (972857310).

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

641280450 is a wasteful number, since it uses less digits than its factorization.

641280450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63891 (or 63886 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 641280450 is about 25323.5157511748. The cubic root of 641280450 is about 862.3482110538.

The spelling of 641280450 in words is "six hundred forty-one million, two hundred eighty thousand, four hundred fifty".