4390884121 has 4 divisors (see below), whose sum is σ = 4728644452. Its totient is φ = 4053123792.

The previous prime is 4390884119. The next prime is 4390884131. The reversal of 4390884121 is 1214880934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2676924121 + 1713960000 = 51739^2 + 41400^2 .

It is a cyclic number.

It is not a de Polignac number, because 4390884121 - 2¹ = 4390884119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4390884101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168880146 + ... + 168880171.

It is an arithmetic number, because the mean of its divisors is an integer number (1182161113).

Almost surely, 2^4390884121 is an apocalyptic number.

It is an amenable number.

4390884121 is a deficient number, since it is larger than the sum of its proper divisors (337760331).

4390884121 is a wasteful number, since it uses less digits than its factorization.

4390884121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337760330.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 4390884121 is about 66263.7466568259. The cubic root of 4390884121 is about 1637.5101173432.

The spelling of 4390884121 in words is "four billion, three hundred ninety million, eight hundred eighty-four thousand, one hundred twenty-one".