7826821436 has 24 divisors (see below), whose sum is σ = 15868080480. Its totient is φ = 3308401152.

The previous prime is 7826821433. The next prime is 7826821507. The reversal of 7826821436 is 6341286287.

It is a super-2 number, since 2×7826821436² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7826821433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912541 + ... + 1916628.

It is an arithmetic number, because the mean of its divisors is an integer number (661170020).

Almost surely, 2^7826821436 is an apocalyptic number.

It is an amenable number.

7826821436 is an abundant number, since it is smaller than the sum of its proper divisors (8041259044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7826821436 is a wasteful number, since it uses less digits than its factorization.

7826821436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829253 (or 3829251 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 7826821436 is about 88469.3248307005. The cubic root of 7826821436 is about 1985.4630475054.

The spelling of 7826821436 in words is "seven billion, eight hundred twenty-six million, eight hundred twenty-one thousand, four hundred thirty-six".