838151649 has 12 divisors (see below), whose sum is σ = 1252410900. Its totient is φ = 539499744.

The previous prime is 838151647. The next prime is 838151659. The reversal of 838151649 is 946151838.

It can be written as a sum of positive squares in 2 ways, for example, as 238146624 + 600005025 = 15432^2 + 24495^2 .

It is not a de Polignac number, because 838151649 - 2¹ = 838151647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (838151647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1605394 + ... + 1605915.

It is an arithmetic number, because the mean of its divisors is an integer number (104367575).

Almost surely, 2^838151649 is an apocalyptic number.

It is an amenable number.

838151649 is a deficient number, since it is larger than the sum of its proper divisors (414259251).

838151649 is a wasteful number, since it uses less digits than its factorization.

838151649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211344 (or 3211341 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 838151649 is about 28950.8488476590. The cubic root of 838151649 is about 942.8462279630.

The spelling of 838151649 in words is "eight hundred thirty-eight million, one hundred fifty-one thousand, six hundred forty-nine".