641847438 has 12 divisors (see below), whose sum is σ = 1390669488. Its totient is φ = 213949140.

The previous prime is 641847433. The next prime is 641847457. The reversal of 641847438 is 834748146.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 641847393 and 641847402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641847433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17829078 + ... + 17829113.

It is an arithmetic number, because the mean of its divisors is an integer number (115889124).

Almost surely, 2^641847438 is an apocalyptic number.

641847438 is an abundant number, since it is smaller than the sum of its proper divisors (748822050).

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

641847438 is a wasteful number, since it uses less digits than its factorization.

641847438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35658199 (or 35658196 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 641847438 is about 25334.7081688343. The cubic root of 641847438 is about 862.6022845299.

The spelling of 641847438 in words is "six hundred forty-one million, eight hundred forty-seven thousand, four hundred thirty-eight".