4390529338881 has 81 divisors (see below), whose sum is σ = 7451586371619. Its totient is φ = 2483855321472.

The previous prime is 4390529338879. The next prime is 4390529338933. The reversal of 4390529338881 is 1888339250934.

The square root of 4390529338881 is 2095359.

It is a perfect power (a square), and thus also a powerful number.

4390529338881 is a `hidden beast` number, since 4 + 3 + 90 + 5 + 2 + 93 + 388 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77364641025 + 4313164697856 = 278145^2 + 2076816^2 .

It is not a de Polignac number, because 4390529338881 - 2¹ = 4390529338879 is a prime.

It is a super-2 number, since 2×4390529338881² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (4390529338841) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4972286466 + ... + 4972287348.

Almost surely, 2^{4390529338881} is an apocalyptic number.

4390529338881 is the 2095359-th square number.

4390529338881 is the 1047680-th centered octagonal number.

It is an amenable number.

4390529338881 is a deficient number, since it is larger than the sum of its proper divisors (3061057032738).

4390529338881 is an frugal number, since it uses more digits than its factorization.

4390529338881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 4390529338881 in words is "four trillion, three hundred ninety billion, five hundred twenty-nine million, three hundred thirty-eight thousand, eight hundred eighty-one".