641384688 has 40 divisors (see below), whose sum is σ = 1893612928. Its totient is φ = 183252672.

The previous prime is 641384657. The next prime is 641384719. The reversal of 641384688 is 886483146.

It is an interprime number because it is at equal distance from previous prime (641384657) and next prime (641384719).

It is a super-2 number, since 2×641384688² = 822748636001714688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 954106 + ... + 954777.

Almost surely, 2^641384688 is an apocalyptic number.

It is an amenable number.

641384688 is an abundant number, since it is smaller than the sum of its proper divisors (1252228240).

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

641384688 is a wasteful number, since it uses less digits than its factorization.

641384688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908901 (or 1908895 counting only the distinct ones).

The product of its digits is 884736, while the sum is 48.

The square root of 641384688 is about 25325.5737940920. The cubic root of 641384688 is about 862.3949324651.

The spelling of 641384688 in words is "six hundred forty-one million, three hundred eighty-four thousand, six hundred eighty-eight".