344436220638 has 72 divisors (see below), whose sum is σ = 775209242808. Its totient is φ = 110467149408.

The previous prime is 344436220627. The next prime is 344436220657. The reversal of 344436220638 is 836022634443.

It is a happy number.

344436220638 is a `hidden beast` number, since 3 + 4 + 4 + 4 + 3 + 6 + 2 + 2 + 0 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 344436220593 and 344436220602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3424920 + ... + 3524052.

It is an arithmetic number, because the mean of its divisors is an integer number (10766795039).

Almost surely, 2^344436220638 is an apocalyptic number.

344436220638 is an abundant number, since it is smaller than the sum of its proper divisors (430773022170).

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

344436220638 is a wasteful number, since it uses less digits than its factorization.

344436220638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99318 (or 99248 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 45.

The spelling of 344436220638 in words is "three hundred forty-four billion, four hundred thirty-six million, two hundred twenty thousand, six hundred thirty-eight".