438228100477 has 4 divisors (see below), whose sum is σ = 438231567996. Its totient is φ = 438224632960.

The previous prime is 438228100463. The next prime is 438228100489. The reversal of 438228100477 is 774001822834.

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 117607157721 + 320620942756 = 342939^2 + 566234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438228100477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438228100417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536724 + ... + 1799437.

It is an arithmetic number, because the mean of its divisors is an integer number (109557891999).

Almost surely, 2^438228100477 is an apocalyptic number.

It is an amenable number.

438228100477 is a deficient number, since it is larger than the sum of its proper divisors (3467519).

438228100477 is a wasteful number, since it uses less digits than its factorization.

438228100477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467518.

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 438228100477 in words is "four hundred thirty-eight billion, two hundred twenty-eight million, one hundred thousand, four hundred seventy-seven".