438975811 has 4 divisors (see below), whose sum is σ = 442180152. Its totient is φ = 435771472.

The previous prime is 438975793. The next prime is 438975847. The reversal of 438975811 is 118579834.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 438975811 - 2¹¹ = 438973763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438975011) 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, 1601965 + ... + 1602238.

It is an arithmetic number, because the mean of its divisors is an integer number (110545038).

Almost surely, 2^438975811 is an apocalyptic number.

438975811 is a deficient number, since it is larger than the sum of its proper divisors (3204341).

438975811 is a wasteful number, since it uses less digits than its factorization.

438975811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204340.

The product of its digits is 241920, while the sum is 46.

The square root of 438975811 is about 20951.7495928144. The cubic root of 438975811 is about 759.9998909280. Note that the first 3 decimals are identical.

It can be divided in two parts, 4389 and 75811, that added together give a triangular number (80200 = T₄₀₀).

The spelling of 438975811 in words is "four hundred thirty-eight million, nine hundred seventy-five thousand, eight hundred eleven".