7826738399 has 16 divisors (see below), whose sum is σ = 8243665920. Its totient is φ = 7420717920.

The previous prime is 7826738363. The next prime is 7826738401. The reversal of 7826738399 is 9938376287.

It is a happy number.

It is not a de Polignac number, because 7826738399 - 2¹² = 7826734303 is a prime.

It is a super-2 number, since 2×7826738399² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7826758399) 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 15 ways as a sum of consecutive naturals, for example, 392234 + ... + 411704.

It is an arithmetic number, because the mean of its divisors is an integer number (515229120).

Almost surely, 2^7826738399 is an apocalyptic number.

7826738399 is a deficient number, since it is larger than the sum of its proper divisors (416927521).

7826738399 is a wasteful number, since it uses less digits than its factorization.

7826738399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19750.

The product of its digits is 27433728, while the sum is 62.

The square root of 7826738399 is about 88468.8555311981. The cubic root of 7826738399 is about 1985.4560260311.

The spelling of 7826738399 in words is "seven billion, eight hundred twenty-six million, seven hundred thirty-eight thousand, three hundred ninety-nine".