1039998726 has 96 divisors (see below), whose sum is σ = 2518483968. Its totient is φ = 308007360.

The previous prime is 1039998721. The next prime is 1039998733. The reversal of 1039998726 is 6278999301.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1039998721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2226745 + ... + 2227211.

It is an arithmetic number, because the mean of its divisors is an integer number (26234208).

Almost surely, 2^1039998726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1039998726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259241984).

1039998726 is an abundant number, since it is smaller than the sum of its proper divisors (1478485242).

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

1039998726 is a wasteful number, since it uses less digits than its factorization.

1039998726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1039998726 is about 32249.0112406567. The cubic root of 1039998726 is about 1013.1589901133.

The spelling of 1039998726 in words is "one billion, thirty-nine million, nine hundred ninety-eight thousand, seven hundred twenty-six".