438109399 has 16 divisors (see below), whose sum is σ = 539719488. Its totient is φ = 346309632.

The previous prime is 438109393. The next prime is 438109439. The reversal of 438109399 is 993901834.

It is a cyclic number.

It is not a de Polignac number, because 438109399 - 2²⁷ = 303891671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438109393) 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, 153009 + ... + 155845.

It is an arithmetic number, because the mean of its divisors is an integer number (33732468).

Almost surely, 2^438109399 is an apocalyptic number.

438109399 is a deficient number, since it is larger than the sum of its proper divisors (101610089).

438109399 is a wasteful number, since it uses less digits than its factorization.

438109399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 438109399 is about 20931.0630164834. The cubic root of 438109399 is about 759.4995545413.

The spelling of 438109399 in words is "four hundred thirty-eight million, one hundred nine thousand, three hundred ninety-nine".