438128066340 has 96 divisors (see below), whose sum is σ = 1367420463360. Its totient is φ = 116460834048.

The previous prime is 438128066279. The next prime is 438128066381. The reversal of 438128066340 is 43660821834.

438128066340 is a `hidden beast` number, since 4 + 3 + 8 + 1 + 2 + 8 + 0 + 6 + 634 + 0 = 666.

438128066340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1127064 + ... + 1465103.

It is an arithmetic number, because the mean of its divisors is an integer number (14243963160).

Almost surely, 2^438128066340 is an apocalyptic number.

It is an amenable number.

438128066340 is an abundant number, since it is smaller than the sum of its proper divisors (929292397020).

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

438128066340 is a wasteful number, since it uses less digits than its factorization.

438128066340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592498 (or 2592490 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 438128066340 in words is "four hundred thirty-eight billion, one hundred twenty-eight million, sixty-six thousand, three hundred forty".