438042561 has 16 divisors (see below), whose sum is σ = 639203520. Its totient is φ = 264625920.

The previous prime is 438042557. The next prime is 438042569. The reversal of 438042561 is 165240834.

It is not a de Polignac number, because 438042561 - 2² = 438042557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (438042569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10876 + ... + 31533.

It is an arithmetic number, because the mean of its divisors is an integer number (39950220).

Almost surely, 2^438042561 is an apocalyptic number.

It is an amenable number.

438042561 is a deficient number, since it is larger than the sum of its proper divisors (201160959).

438042561 is a wasteful number, since it uses less digits than its factorization.

438042561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42736.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 438042561 is about 20929.4663333779. The cubic root of 438042561 is about 759.4609294757.

The spelling of 438042561 in words is "four hundred thirty-eight million, forty-two thousand, five hundred sixty-one".