826706388 has 72 divisors (see below), whose sum is σ = 2082040576. Its totient is φ = 255024000.

The previous prime is 826706381. The next prime is 826706389. The reversal of 826706388 is 883607628.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (826706381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194688 + ... + 198888.

Almost surely, 2^826706388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 826706388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041020288).

826706388 is an abundant number, since it is smaller than the sum of its proper divisors (1255334188).

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

826706388 is a wasteful number, since it uses less digits than its factorization.

826706388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 826706388 is about 28752.5022911050. The cubic root of 826706388 is about 938.5349094773.

The spelling of 826706388 in words is "eight hundred twenty-six million, seven hundred six thousand, three hundred eighty-eight".