1001026436 has 24 divisors (see below), whose sum is σ = 1856063160. Its totient is φ = 470761472.

The previous prime is 1001026387. The next prime is 1001026451. The reversal of 1001026436 is 6346201001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 559606336 + 441420100 = 23656^2 + 21010^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124556 + ... + 132348.

It is an arithmetic number, because the mean of its divisors is an integer number (77335965).

Almost surely, 2^1001026436 is an apocalyptic number.

It is an amenable number.

1001026436 is a deficient number, since it is larger than the sum of its proper divisors (855036724).

1001026436 is a wasteful number, since it uses less digits than its factorization.

1001026436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9703 (or 9701 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1001026436 is about 31639.0018173772. The cubic root of 1001026436 is about 1000.3420283366.

Adding to 1001026436 its reverse (6346201001), we get a palindrome (7347227437).

The spelling of 1001026436 in words is "one billion, one million, twenty-six thousand, four hundred thirty-six".