1000139976 has 96 divisors (see below), whose sum is σ = 2984454720. Its totient is φ = 300048000.

The previous prime is 1000139947. The next prime is 1000139983. The reversal of 1000139976 is 6799310001.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1000139976.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 73741 + ... + 86243.

It is an arithmetic number, because the mean of its divisors is an integer number (31088070).

Almost surely, 2^1000139976 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 1000139976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492227360).

1000139976 is an abundant number, since it is smaller than the sum of its proper divisors (1984314744).

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

1000139976 is a wasteful number, since it uses less digits than its factorization.

1000139976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12627 (or 12620 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 1000139976 is about 31624.9897391288. The cubic root of 1000139976 is about 1000.0466564898.

Adding to 1000139976 its reverse (6799310001), we get a palindrome (7799449977).

The spelling of 1000139976 in words is "one billion, one hundred thirty-nine thousand, nine hundred seventy-six".