838155449 has 4 divisors (see below), whose sum is σ = 840156240. Its totient is φ = 836154660.

The previous prime is 838155431. The next prime is 838155481. The reversal of 838155449 is 944551838.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 838155449 - 2¹⁶ = 838089913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838155499) 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, 999767 + ... + 1000604.

It is an arithmetic number, because the mean of its divisors is an integer number (210039060).

Almost surely, 2^838155449 is an apocalyptic number.

It is an amenable number.

838155449 is a deficient number, since it is larger than the sum of its proper divisors (2000791).

838155449 is a wasteful number, since it uses less digits than its factorization.

838155449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000790.

The product of its digits is 691200, while the sum is 47.

The square root of 838155449 is about 28950.9144760576. The cubic root of 838155449 is about 942.8476528484.

The spelling of 838155449 in words is "eight hundred thirty-eight million, one hundred fifty-five thousand, four hundred forty-nine".